The present invention relates to a method for producing (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid and a synthetic intermediate thereof. The (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid produced by the method of the present invention is useful as a synthetic intermediate for drugs and the like that inhibit β-lactamase.
Background technology
[0002]
　(2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid is a drug that inhibits β-lactamase, which is the main cause of resistance to bacteria that are resistant to β-lactam antibiotics. It is a useful intermediate for the synthesis of.
　As a method for producing (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid, a production method using glutamic acid or pyroglutamic acid as a starting material is known. Specifically, in Patent Document 1, pyroglutamic acid is used as a starting material, and as an intermediate of N-protected oxoazacycloalkylcarboxylic acid, a 5-hydroxypiperidine-2-carboxylic acid is obtained through a coal-increasing and cyclization step. It is stated that a protective body is manufactured.
　Further, Non-Patent Document 1 describes that a protected substance of 5-hydroxypiperidine-2-carboxylic acid is produced by using glutamine as a starting material through a coal increasing / cyclization step.
　Non-Patent Document 2 describes that a protected product of 5-hydroxypiperidine-2-carboxylic acid is produced as a stereoisomer mixture using protected glutamic acid as a starting material through a coal increasing / cyclization step. ..
　Non-Patent Document 3 describes that a protected product of 5-hydroxypiperidine-2-carboxylic acid is produced from protected pyroglutamic acid as a starting material through a coal increasing / cyclization step.
　Patent Document 2 describes that a protected product of 5-hydroxypiperidine-2-carboxylic acid is produced by using protected pyroglutamic acid as a starting material and undergoing a step of increasing coal and cyclizing in one step. ..
Prior art literature
Patent documents
[0003]
Patent Document 1: WO2010 / 126820
Patent Document 2: WO2006 / 125974
Non-patent literature
[0004]
Non-Patent Document 1: PD Bailey et al., Chem. Commun. 1996, 349.
Non-Patent Document 2: PD Bailey et al., Tetrahedron Lett. 1988, 29, 2231.
Non-Patent Document 3: MA Letavic et al., Bioorg. Med. Chem. Lett. 2002, 12, 1387.
Outline of the invention
Problems to be solved by the invention
[0005]
　The method for producing (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid described in Patent Document 1 requires the use of a very expensive iridium catalyst and is suitable for industrialization. No.
　The production method described in Non-Patent Document 1 also needs to use an expensive rhodium catalyst, and further, there is a step of using diazomethane which is difficult to use industrially, so that it is difficult to industrialize.
　The production method described in Non-Patent Document 2 also has a problem that it is difficult to industrialize because there is a step of using diazomethane which is difficult to use industrially, and further, the obtained compound becomes a mixture of three isomers.
　The production methods described in Non-Patent Document 3 and Patent Document 2 are also difficult to use industrially, and are difficult to industrialize because there is a step using expensive TMS diazomethane, and the production methods described in Patent Document 2 are expensive. It is necessary to use a rhodium catalyst. Since both the production methods described in Non-Patent Document 3 and Patent Document 2 need to be reacted at extremely low temperatures, industrialization is difficult.
　In view of the above-mentioned problems, the present invention is a method for producing an achiral form and a chiral form of (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid and its synthetic intermediate. An object of the present invention is to provide a manufacturing method that can be practically used industrially.
Means to solve problems
[0006]
　As a result of diligent studies to solve the above problems, the present inventors have obtained optics of (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid by using a specific synthetic intermediate. We have found that an active substance can be efficiently synthesized, and completed the present invention.
[0007]
　That is, the present invention is as follows.
<1>
i) Step 4: The following
　formula (7)
[Chemical

formula 1] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents an alkyl group having 1 to 10 carbon atoms. Deprotecting the hydroxyl group in the compound represented by an alkyl group, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 20 carbon atoms is described
　below. Formula (8)
[Chemical

formula 2] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 to 1 to carbon atoms. 4 alkyl group, or process, for synthesizing shown.) and a compound represented by the aralkyloxy group having 7 to 20 carbon atoms
　, characterized in that it comprises the following formula (10)
[formula 3]

is represented by (2S, 5S) / (2R, 5R) -Method for producing 5-hydroxypiperidin-2-carboxylic acid.
[0008]
<2>
　Further, (ii) step 5:
(a) In the compound (8), the ester group is hydrolyzed, one of the carboxyl groups is reacted with the hydroxyl group to form a lactone, and the carboxyl group is decarbonated. let,
　or,
(b) the compound (8), an ester group is hydrolyzed, one of the carboxyl groups and stereoisomeric mixture of the 2-position monocarboxylic acid by decarboxylation, then the stereo isomer mixture the isomerizing lactonization,
by,
　the following equation (9)
[formula 4]

(wherein, a represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms or 1 to 4 carbon atoms, alkyloxy group, step, to synthesize compounds represented by indicating.) an aralkyloxy group having 7 to 20 carbon atoms
　, characterized in that it comprises a according to <1> (2S, 5S) / (2R, 5R) A method for producing -5-hydroxypiperidin-2-carboxylic acid.
[0009]
<3>
　Further, (iii) step 6:
　the amide bond in the compound (9) is cleaved, and the lactone in the compound (9) is hydrolyzed to
(2S, 5S) / (2R, 5R) -5.
　(2S, 5S) / (2R, 5R) -5-Hydroxypiperidin-2- according to <1> or <2> , which comprises a step of synthesizing -hydroxypiperidin-2-carboxylic acid. Method for producing carboxylic acid.
[0010]
<4> In 　<2> or <3>,
　the reaction for decarboxylating the carboxyl group in the step 5 (a) or the step 5 (b) is carried out in the presence of an organic base.
The method for producing (2S, 5S) / (2R, 5R) -5-hydroxypiperidin-2-carboxylic acid according to the above method.
[0011]
<5>
　Step 1: The following
　formula (1)
[Chemical

formula 5] (In the formula, X represents Cl, Br, or I, and R 1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted. The hydroxyl group in the compound represented by) is protected by a protective group, and the following
　formula (2)
[Chemical

formula 6] (in the formula, X represents Cl, Br, or I, R 1 is a hydrogen atom or It represents an alkyl group having 1 to 4 carbon atoms which may be substituted, and P represents a protective group.) The compound represented by) is synthesized, and
　then the ester group in the compound (2) is reduced to the following
　formula. (3)
[chemical formula 7]

(wherein, X is Cl, Br or indicates I, P represents a protecting group.) step for synthesizing the compound represented by
　characterized in that it comprises a
　formula ( 7)
[Chemical

formula 8] (In the formula, P represents a protective group, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, and an aryl group having 6 to 12 carbon atoms. , A
method for producing a compound represented by an alkyloxy group having 1 to 4 carbon atoms or an aralkyloxy group having 7 to 20 carbon atoms .
[0012]
<6>
(i) Step 2:
　The hydroxyl group in the compound (3) is sulfonic acid esterified to represent the following
　formula (4)
[Chemical

formula 9] (in the formula, X represents Cl, Br, or I, and R 2 is A compound represented by an aryl group having 6 to 12 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms is synthesized, and the
　compound (4) and the following
　formula ( 5)
[Chemical

formula 10] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 to 4 carbon atoms. By reacting with an alkyloxy group or a compound represented by an aralkyloxy group having 7 to 20 carbon atoms, the following
　formula (6)
[Chemical

formula 11] (in the formula, X is Cl, Br, or I) , P indicates a protective group, R 3 indicates an alkyl group having 1 to 4 carbon atoms, A indicates an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 to 4 carbon atoms. A step of synthesizing a compound represented by an alkyloxy group or an aralkyloxy group having 7 to 20 carbon atoms), and
(ii) step 3:
　cyclizing the compound (6).
　The following formula (7)
[Chemical

formula 12] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms and 6 to 12 carbon atoms. aryl group,.) represents an alkyl group or an aralkyl group having 7 to 20 carbon atoms, having 1 to 4 carbon atoms
step, to synthesize compounds represented by
　characterized in that it comprises a, in <5> The method for producing the compound (7) according to the above.
[0013]
<7> 　The production of the compound (7) according to <6>,
　wherein in the step 2, the reaction between the compound (4) and the compound (5) is carried out in the presence of an iodine salt.
Method.
[0014]
<8> 　The compound (7) according to <6> or <7>
　, wherein the cyclization reaction of the compound (6) is carried out in the presence of a quaternary ammonium salt in the step 3.
Production method.
[0015]
<9>
　Described in any one of
　<1> to <4>, wherein the compound (7) is produced by the method according to any one of <5> to <8>. (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid production method.
[0016]
<10>
(i) Step 4: The following
　formula (7)
[Chemical

formula 13] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents an alkyl group having 1 to 10 carbon atoms. Deprotects the hydroxyl group in the compound represented by the alkyl group, the aryl group having 6 to 12 carbon atoms, the alkyloxy group having 1 to 4 carbon atoms, or the aralkyloxy group having 7 to 20 carbon atoms.
　The following formula (8)
[Chemical

formula 14] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 carbon number. The compound represented
　by the above formula (8) , which comprises a step of synthesizing a compound represented by an alkyloxy group of to 4 or an aralkyloxy group having 7 to 20 carbon atoms. Production method.
[0017]
<11>
(i) Step 4: The following
　formula (7)
[Chemical

formula 15] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents an alkyl group having 1 to 10 carbon atoms. Deprotects the hydroxyl group in the compound represented by the alkyl group, the aryl group having 6 to 12 carbon atoms, the alkyloxy group having 1 to 4 carbon atoms, or the aralkyloxy group having 7 to 20 carbon atoms.
　The following formula (8)
[Chemical

formula 16] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 carbon number. synthesising alkyloxy group 1-4, or a compound represented by) an aralkyl group having a carbon number of 7 - 20,.
(ii) step 5:
(a) in the compound (8), an ester group It is hydrolyzed and lactonized by reacting one carboxyl group with a hydroxyl group, and further decarbonated,
　or
(b) in the compound (8), the ester group is hydrolyzed and one carboxyl is used. The group is decarbonated to form a steric isomer mixture of the 2-position monocarboxylic acid, and then the steric isomer mixture is isomerized and lactonized,
whereby the following
　formula (9)
[Chemical formula 17] is obtained.

(In the formula, A represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkyloxy group having 1 to 4 carbon atoms and an aralkyloxy group having 7 to 20 carbon atoms). A
　method for producing a compound represented by the above formula (9) , which comprises a step of synthesizing the compound to be used.
[0018]
<12>
　A compound represented by the following formula (9a).
[Chemical

formula 18] (In the formula, A'indicates an aryl group having 6 to 12 carbon atoms or an alkyl group having 1 to 10 carbon atoms.)
[0019]
<13>
　A compound represented by the following formula (11a) or (11b) or a salt thereof.
[Chemical

formula 19] (In the formula, A'indicates an aryl group having 6 to 12 carbon atoms or an alkyl group having 1 to 10 carbon atoms.)
[Chemical

formula 20] (In the formula , A'represents an aryl group having 6 to 12 carbon atoms. Indicates a group or an alkyl group having 1 to 10 carbon atoms.)
[0020]
<14>
　A compound represented by the following formula (8) or a salt of a dicarboxylic acid thereof.
[Chemical

formula 21] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyloxy having 1 to 4 carbon atoms. Indicates a group or an aralkyloxy group having 7 to 20 carbon atoms.)
[0021]
<15>
　A compound represented by the following formula (7).
[Chemical

formula 22] (In the formula, P indicates a protective group, R 3 indicates an alkyl group having 1 to 4 carbon atoms, A indicates an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and carbon. It indicates an alkyloxy group having a number of 1 to 4 or an aralkyloxy group having a carbon number of 7 to 20.)
[0022]
<16>
　A compound represented by the following formula (6a).
[Chemical 23]

(In the formula, X represents Cl, Br, or I, P'shows a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or 7 to 20 carbon atoms. Indicates the aralkyloxy group of.)
[0023]
<17>
　A compound represented by the following formula (4a).
[Chemical

formula 24] (In the formula, X represents Cl, Br, or I, and P'represents a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. R 2 represents an aryl group having 6 to 12 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms.)
[0024]
<18>
　A compound represented by the following formula (3a).
[Chemical

formula 25] (In the formula, X represents Cl, Br, or I, and P'represents a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. )
[0025]
<19>
　A compound represented by the following formula (2a).
[Chemical

formula 26] (In the formula, X represents Cl, Br, or I, R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted, and P'' represents a tetrahydropyranyl group. , Or an ethoxyethyl group.)
The invention's effect
[0026]
　According to the present invention, it is possible to provide (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid, an industrially practical production method having excellent safety and operability. can. Further, according to the present invention, it is possible to provide a novel synthetic intermediate for producing (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid. The (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid produced by the production method of the present invention can be used as a starting material in the production of a drug or the like that inhibits β-lactamase. ..
A brief description of the drawing
[0027]
FIG. 1 is a diagram showing an aspect of a synthesis scheme of (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid. In the figure, X indicates Cl, Br, or I. P represents a protecting group. A represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 20 carbon atoms. R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted. R 2 represents an aryl group having 6 to 12 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms. R 3 represents an alkyl group having 1 to 4 carbon atoms.
Mode for carrying out the invention
[0028]
　Hereinafter, the present invention will be described in detail.
　In the present specification, the "compound represented by the formula (1)" may be referred to as "compound (1)". The same applies to the compounds represented by other formulas.
　In the present specification, Cl represents a chlorine atom, Br represents a bromine atom, I represents an iodine atom, and Et represents an ethyl group.
[0029]
[1] Production Method In the
　present invention, by using a specific synthetic intermediate represented by the following formula (8) or (9), (2S, 5S) / (2R, 5R) -5-hydroxypiperidine- It is characterized by producing an optically active substance of 2-carboxylic acid.
[Chemical

formula 27] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyloxy having 1 to 4 carbon atoms. Indicates a group or an aralkyloxy group having 7 to 20 carbon atoms.)
[Chemical

formula 28] (In the formula, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, or 1 to 4 carbon atoms. Alkyloxy group and aralkyloxy group having 7 to 20 carbon atoms are shown.)
[0030]
　Compound (8) can be synthesized by using an ordinary organic chemical method, but it is preferably synthesized by the following step 4.
　Step 4 is a method for producing a compound represented by the formula (8) (compound (8)) using the compound (7) as a raw material.
　Step 4: The following
　formula (7)
[Chemical

formula 29] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents an alkyl group having 1 to 10 carbon atoms and a carbon number of carbon atoms.
Deprotecting the hydroxyl group in the compound represented by an aryl group of 6 to 12, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 20 carbon atoms is carried out in the following
　formula (8)
[ 30]

(In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyloxy group having 1 to 4 carbon atoms. , Or a compound represented by an aralkyloxy group having 7 to 20 carbon atoms can be synthesized.
[0031]
　As the deprotection conditions, conditions generally used for deprotection of each protecting group can be adopted, and an acid or a combination of an acid catalyst and an alcohol is usually used.
　As the acid used for deprotection, inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid, and organic acids such as methanesulfonic acid, p-toluenesulfonic acid, oxalic acid, trifluoroacetic acid, formic acid and acetic acid are usually used. Preferably, hydrochloric acid and p-toluenesulfonic acid are used.
　As the acid catalyst, an inorganic acid such as hydrochloric acid or sulfuric acid or an organic acid such as methanesulfonic acid or p-toluenesulfonic acid is usually used, and hydrochloric acid or p-toluenesulfonic acid is preferably used.
　As the alcohol, methanol, ethanol, n-propanol, 2-propanol, n-butanol and the like are usually used, and methanol is preferably used.
　For example, when P in the formula (7) is a tetrahydropyranyl group or an ethoxyethyl group, it is preferable to act with hydrochloric acid as a catalyst in a methanol solvent, and deprotection can be easily carried out by this method.
[0032]
　Among the compounds represented by the formula (8), the compound represented by the following formula (8a)
[Chemical

Formula 31] (Ac represents an acetyl group in the formula)
is crystalline and therefore crystallizes after deprotection . It is easy to isolate and purify, and a high-purity compound (8a) can be synthesized. Since high-purity (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid can be synthesized by synthesizing using the high-purity compound (8a), the compound (8a) can be synthesized. ) Is particularly preferable as a synthetic intermediate. As the crystallization solvent, for example, toluene or a mixed solvent of toluene and heptane can be used.
　In compound (8), R 3 and A are synonymous with R 3 and A in compound (5) described later .
[0033]
　Compound (9) can be synthesized by using an ordinary organic chemical method, but it is preferably synthesized by the following step 5.
　Step 5 is a method for producing a compound represented by the formula (9) (compound (9)) using the compound (8) as a raw material. As the step 5, the following step 5 (a) or step 5 (b) is preferable.
[0034]
　Step 5 (a): In the
　compound (8), the ester group is hydrolyzed, one carboxyl group is reacted with a hydroxyl group to form a lactone, and the carboxyl group is decarbonated to obtain the following
　formula (9). )
[of 32]

(wherein, a represents an alkyl group, an aryl group having 6 to 12 carbon atoms in the alkyl group, an aryl group having 6 to 12 carbon atoms, carbon atoms of 1 to 10 1 to 10 carbon atoms or carbon, A compound represented by an alkyloxy group having a number of 1 to 4 and an aralkyloxy group having a carbon number of 7 to 20 is synthesized.
[0035]
　In step 5 (a), first, the ester group of compound (8) is hydrolyzed. A base is used to hydrolyze the ester group.
　Water, methanol, ethanol and the like are used as the reaction solvent.
　As the base, sodium hydroxide, potassium hydroxide and the like can be used, and among them, sodium hydroxide is preferable.
　The amount of the base used is usually 2 to 10 times mol, preferably 2 times to 5 times mol, with respect to compound (8).
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 50 ° C., preferably 0 ° C. to 10 ° C.
　The reaction time is not particularly limited, but is usually 1 hour to 24 hours, preferably 5 hours to 10 hours.
[0036]
　Next, the ester group of compound (8) is hydrolyzed (ester decomposition), and then one of the carboxyl groups is reacted with a hydroxyl group to lactonize the compound (8).
　In order to perform decarboxylation after lactonization, first, the dicarboxylic acid obtained by ester decomposition is reacted with a dehydrating agent to induce a hydroxyl group at the 5-position and a carboxyl group having a cis arrangement in the lactone.
　As the dehydrating agent, for example, a general dehydrating agent such as acetic anhydride, acetyl chloride, thionyl chloride and the like can be used.
　The reaction solvent is not particularly limited as long as it does not inhibit the reaction, but acetic acid or a mixed solvent of acetic acid and toluene is preferably used.
[0037]
　The amount of the dehydrating agent used is usually 1 to 20 times the molar amount, preferably 1 to 5 times the molar amount, based on the compound (8) obtained by hydrolyzing the ester group.
[0038]
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 80 ° C., preferably 30 ° C. to 60 ° C.
　The reaction time is not particularly limited, but is usually 1 hour to 12 hours, preferably 2 hours to 5 hours.
[0039]
　After lactonizing one carboxyl group, the other carboxyl group is further decarboxylated.
　When decarboxylating the other remaining carboxyl group, protonation after decarboxylation proceeds stereoselectively by fixing the three-dimensional structure by lactonization, and the hydroxyl group and the carboxyl group are cis-arranged 5-acyl-. A compound (9) having a 2-oxa-5-azabicyclo [2.2.2] octane-3-one structure is obtained.
　Decarboxylation proceeds only by heating (simple heating), but it is preferable because the reaction is accelerated by adding an organic base such as triethylamine or pyridine, and the reaction at a low temperature becomes possible.
　The reaction temperature when decarboxylation is carried out by simple heating is usually 100 ° C. to 130 ° C., and the reaction temperature when an organic base is added is usually 60 ° C. to 90 ° C.
　The reaction solvent is not particularly limited as long as it does not inhibit the reaction, but acetic acid or a mixed solvent of acetic acid and toluene is preferably used.
[0040]
　The amount of the organic base used is usually 0.1 times to 2 times mol, preferably 0.2 times to 1 times mol, with respect to the lactonized compound (8).
　The reaction time is not particularly limited, but is usually 1 hour to 12 hours, preferably 2 hours to 5 hours.
[0041]
　Step 5 (b): In the
　compound (8), the ester group is hydrolyzed and one of the carboxyl groups is decarbonated to obtain a three-isomer mixture of the 2-position monocarboxylic acid, and then the three-isomer mixture is prepared. By isomerization lactoneization, the following
　formula (9)
[Chemical

formula 33] (In the formula, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkyloxy having 1 to 4 carbon atoms. A compound represented by a group and an aralkyloxy group having 7 to 20 carbon atoms is synthesized.
[0042]
　In step 5 (b), hydrolysis of the ester group of compound (8) can be carried out under the same conditions as in step 5 (a).
　After hydrolyzing the ester group of compound (8), one of the carboxyl groups is decarboxylated to obtain a stereoisomer mixture of the 2-position monocarboxylic acid.
　In step 5 (b), since decarboxylation is performed first, the dicarboxylic acid obtained by ester decomposition is first decarboxylated to obtain a steric isomer mixture of the 2-position monocarboxylic acid.
　Decarboxylation proceeds only by heating (simple heating), but the reaction is accelerated by adding an organic base such as triethylamine or pyridine, and the reaction at a low temperature becomes possible.
　The reaction temperature when decarboxylation is carried out by simple heating is usually 100 ° C. to 130 ° C., and the reaction temperature when an organic base is added is usually 60 ° C. to 90 ° C.
　The reaction solvent is not particularly limited as long as it does not inhibit the reaction, but acetic acid or a mixed solvent of acetic acid and methanol is preferably used.
[0043]
　The amount of the organic base used is usually 0.1 times to 2 times mol, preferably 0.2 times to 1 times mol, with respect to the compound (8) obtained by hydrolyzing the ester group.
　The reaction time is not particularly limited, but is usually 1 hour to 12 hours, preferably 2 hours to 5 hours.
[0044]
　The stereoisomer mixture is then isomerized and lactonized. When the steric isomer mixture of the 2-position monocarboxylic acid is isomerized to a lactone, the 2-position carboxyl group immediately forms a lactone with a 5-position hydroxyl group and a cis-arranged one with a cis arrangement, and the 2-position carboxyl group is at the 5-position. Those with a hydroxyl group and a trans configuration form a lactone while being isomerized to a cis configuration. As a result, finally, from all the stereoisomers of the 2-position monocarboxylic acid, 5-acyl-2-oxa-5-azabicyclo [2.2.2] octane-3-one in which the hydroxyl group and the carboxyl group are cis-arranged. The structural compound (9) is obtained. At this time, acetic anhydride, a combination of acetic anhydride and amine, trifluoroacetic anhydride, a combination of trifluoroacetic anhydride and amine, and chloro can be used for simultaneous dehydration and isomerization (dehydration / isomerization lactonizing agent). Examples thereof include a combination of a carbonate ester and an amine, and among them, acetic anhydride or a combination of acetic anhydride and an amine is preferable.
[0045]
　The amount of the dehydration / isomerization lactonizing agent used is usually 1 to 20 times mol, preferably 1 to 5 times mol, with respect to the stereoisomer mixture of the 2-position monocarboxylic acid.
　As the amine in combination with the amine, pyridine, triethylamine and the like are used, and triethylamine is particularly preferable. The amount of the amine used is usually 0.1-fold to 3-fold mol, preferably 0.2-fold to 1-fold mol, relative to the stereoisomer mixture of the 2-position monocarboxylic acid.
　The reaction temperature is not particularly limited, but is usually 20 ° C. to 130 ° C., preferably 60 ° C. to 90 ° C.
　The reaction time is not particularly limited, but is usually 1 hour to 12 hours, preferably 2 hours to 5 hours.
[0046]
　In step 5 (a) and step 5 (b), it is also possible to carry out from the dicarboxylic acid induced by ester decomposition to compound (9) without intermediate isolation and purification.
　In that case, for example, a disodium salt of a dicarboxylic acid is dissolved in acetic acid, acetic anhydride is added to form an intramolecular lactone, and then triethylamine is added and decarboxylated by heating to obtain compound (9). Can be synthesized.
　Further, for example, a disodium salt of a dicarboxylic acid is dissolved in acetic acid, triethylamine is added and heated, and the compound is decarbonated to obtain a steric isomer mixture of a 2-position monocarboxylic acid, and then acetic acid anhydride is added and heated. (9) can also be synthesized. In this case, sodium acetate produced as a by-product can be removed by adding a poor solvent such as toluene to precipitate and filtering.
　When A of the compound (9) synthesized in step 5 (a) or step 5 (b) is a benzyloxy group, it is crystalline and can be isolated and purified by crystallization, so that it has high purity. Compound (9) can be synthesized. Since high-purity (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid can be synthesized by synthesizing using the high-purity compound (9), the compound (9) can be synthesized. ) Is particularly preferable as a synthetic intermediate. As the crystallization solvent, for example, a mixed solvent of toluene and heptane can be used.
　In compound (9), A has the same meaning as A in compound (5) described later.
[0047]
　Here, the raw material compound (7) can be synthesized by using an ordinary organic chemical method, but it is preferably synthesized by the following steps 1 to 3.
　Step 1: This
　is a step of producing a compound represented by the formula (3) (compound (3)) using the compound represented by the formula (1) as a raw material.
　The following formula (1)
[Chemical

formula 34] (In the formula, X represents Cl, Br, or I, and R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted). The hydroxyl group in the compound is protected by a protective group, and the following
　formula (2)
[Chemical

formula 35] (in the formula, X represents Cl, Br, or I, and R 1 may be a hydrogen atom or substituted. It represents an alkyl group having 1 to 4 carbon atoms, and P represents a protective group.) The compound represented by) is synthesized, and
　then the ester group in the compound (2) is reduced to
　formulate the following formula (3)
[Chemical formula 36].

(In the formula, X represents Cl, Br, or I, and P represents a protective group.) The compound represented by is synthesized.
[0048]
　Compound (1) is a starting material for step 1.
　X in the formula (1) is Cl, Br, or I, and preferably X is Cl. R 1 is a hydrogen atom or an optionally substituted good C 1 -C 4 alkyl group, preferably, R 1 is an alkyl group substituted by 1 carbon atoms which may be 1-4. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group and the like. Examples of the substituent of the alkyl group include a halogen atom and an alkoxy group.
　Compound (1) can be easily produced according to a known method, for example, the method described in Tetrahedron: Asymmetry, 12 (12), 1713 (2001) and the like. Further, as the compound (1) in which X in the formula (1) is Cl or Br and R 1 is a methyl group or an ethyl group, a commercially available product can be used.
[0049]
　First, the hydroxyl group in compound (1) is protected with a protecting group to synthesize compound (2).
　As the protecting group, an ether-based protecting group is preferable. The reason for using an ether-based protecting group is that it is convenient to withstand the basic conditions of the next step and thereafter. In compound (2), the oxygen bonded to the protecting group P is derived from a hydroxyl group.
　Protecting groups include tetrahydropyranyl groups, methoxymethyl groups, ethoxyethyl groups, tert-butyl groups, or tert-butyldimethylsilyl groups. Protecting the hydroxyl group by reacting with a combination of dihydropyran and acid catalyst, methoxymethyl chloride and diisopropylethylamine, ethyl vinyl ether and acid catalyst, isobutylene and acid catalyst, tert-butyldimethylsilyl chloride and imidazole, etc. Allows the protecting group to be introduced. Preferred protecting groups are tetrahydropyranyl groups, methoxymethyl groups, ethoxyethyl groups, tert-butyl groups, or tert-butyldimethylsilyl groups. Among them, a tetrahydropyranyl group is preferable as a protecting group because of its high safety.
[0050]
　When a tetrahydropyranyl group is used as the protective group, for example, dihydropyran and an acid catalyst such as methanesulfonic acid, p-toluenesulfonic acid or pyridinium p-toluenesulfonate are added to compound (1) in a reaction solvent. Compound (2) can be obtained by allowing it to act.
　The reaction solvent is not particularly limited as long as the reaction proceeds, but toluene, heptane, dichloromethane, ethyl acetate and the like can be used. In addition, the reaction can proceed even without a solvent.
[0051]
　The amount of dihydropyran used is usually 1 to 10 times mol, preferably 1 to 1.5 times mol, relative to compound (1).
　The amount of the acid catalyst used is usually 0.001 times to 0.1 times mol, preferably 0.002 times to 0.02 times mol, based on the compound (1).
[0052]
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 80 ° C., preferably 20 ° C. to 60 ° C.
　The reaction time is not particularly limited, but is usually 0.5 hours to 10 hours, preferably 1 hour to 3 hours.
[0053]
　Further, in compound (2), X is Cl, Br, or I, and preferably X is Cl.
　In the compound (2), R 1 is a hydrogen atom or an optionally substituted good C 1 -C 4 alkyl group, preferably, R 1 is substituted 1 carbon atoms which may be 1-4 alkyl Is the basis. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group and the like. Examples of the substituent of the alkyl group include a halogen atom and an alkoxy group.
　In compound (2), P is a protecting group, preferably a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group, and particularly preferably a tetrahydropyranyl group. Is.
[0054]
　Next, the ester group in compound (2) is reduced to synthesize compound (3).
　It is preferable to use a hydride-based reducing agent for the reduction of the ester group of compound (2) to alcohol. For example, an aluminum-based hydride reducing agent such as lithium aluminum hydride, diisobutylaluminum hydride or sodium bismethoxyethoxyaluminum hydride, or a boron-based hydride reducing agent such as sodium borohydride, lithium borohydride, calcium borohydride or borane is used. be able to. Above all, since the reaction activity of ester reduction is high, it is preferable to use an aluminum-based hydride reducing agent or lithium borohydride.
[0055]
　For example, compound (3) can be synthesized by reacting compound (2) with an aluminum-based hydride reducing agent in a reaction solvent.
　The reaction solvent is not particularly limited as long as the reaction proceeds, but tetrahydrofuran, toluene and the like can be used. In addition, the reaction can proceed even without a solvent.
[0056]
　The amount of the hydride reducing agent to be used as hydride is usually 2 to 10 times mol, preferably 2 times to 3 times mol, with respect to compound (2).
[0057]
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 80 ° C., preferably 0 ° C. to 20 ° C.
　The reaction time is not particularly limited, but is usually 0.5 hours to 10 hours, preferably 1 hour to 3 hours.
　In addition, in compound (3), X and P are synonymous with X and P in said compound (2).
[0058]
　Step 2:
　A step of producing the compound represented by the formula (6) (compound (6)) using the compound (3) as a raw material.
[0059]
　The hydroxyl group in compound (3) is sulfonic acid esterified to form the following
　formula (4)
[Chemical 37]

(in the formula, X represents Cl, Br, or I, and R 2 is an aryl group having 6 to 12 carbon atoms, carbon. A compound represented by an alkyl group having a number of 1 to 10 or an aralkyl group having a carbon number of 7 to 20 is synthesized, and the
　compound (4) and the following
　formula (5)
[Chemical

formula 38] (in the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or 7 to 20 carbon atoms. Reacts with a compound represented by the following
　formula (6)
[Chemical

formula 39] (in the formula, X represents Cl, Br, or I, and P represents a protective group. R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or 7 to 20 carbon atoms. The compound represented by the aralkyloxy group of) is synthesized.
[0060]
　First, the hydroxyl group in compound (3) is sulfonic acid esterified to synthesize compound (4).
　For the sulfonic acid esterification of the hydroxyl group of the compound (3), a general combination of an alkylsulfonyl chloride and a base and an arylsulfonyl chloride and a base can be adopted. For example, a combination of methanesulfonyl chloride or p-toluenesulfonyl chloride and triethylamine can be adopted.
　For example, compound (4) can be synthesized by allowing compound (3) to react with alkylsulfonyl chloride or arylsulfonyl chloride in a reaction solvent.
　The reaction solvent is not particularly limited as long as the reaction proceeds, but toluene, methylene chloride, tetrahydrofuran, ethyl acetate and the like can be used. In addition, the reaction can proceed even without a solvent.
　Further, as the base, an organic base such as pyridine or triethylamine, an inorganic base such as sodium hydrogen carbonate or sodium hydroxide or the like can be used.
[0061]
　The amount of alkylsulfonyl chloride or arylsulfonyl chloride used is usually 1-fold to 2-fold molars, preferably 1-fold to 1.2-fold molars, relative to compound (3).
　The amount of the base used is usually 1 to 2 times mol, preferably 1 to 1.5 times mol, with respect to compound (3).
[0062]
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 50 ° C., preferably 0 ° C. to 20 ° C.
　The reaction time is not particularly limited, but is usually 0.5 hours to 5 hours, preferably 1 hour to 2 hours.
　In addition, in compound (4), X and P are synonymous with X and P in said compound (2).
　Further, in the compound (4), R 2 is an aryl group having 6 to 12 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, and R 2 is preferably a carbon number of carbon atoms. It is an aryl group of 6 to 7, an alkyl group having 1 to 3 carbon atoms, or an aralkyl group having 7 to 11 carbon atoms, more preferably a methyl group. Examples of the aryl group include a phenyl group, a tolyl group, a naphthyl group, a biphenyl group and the like. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group and an octyl group. And so on. Examples of the aralkyl group include a benzyl group and a phenethyl group.
[0063]
　Next, the compound (4) is reacted with the compound (5) to synthesize the compound (6).
　In compound (5), R 3 represents an alkyl group having 1 to 4 carbon atoms, and is preferably an alkyl group having 1 to 2 carbon atoms. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group and the like.
　Further, in the compound (5), A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 20 carbon atoms. , Preferably an aryl group having 6 to 10 carbon atoms, an alkyl group having 1 to 3 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 11 carbon atoms, and more preferably a methyl group. Is. Examples of the aryl group include a phenyl group, a naphthyl group, a biphenyl group and the like. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group and an octyl group. And so on. Examples of the alkyloxy group include a methyloxy group, an ethyloxy group, an n-propyloxy group, an isopropyloxy group, an n-butyloxy group, an isobutyloxy group, a tert-butyloxy group and the like. Examples of the aralkyloxy group include a benzyloxy group and a phenethyloxy group.
　As the compound (5), a commercially available product can be used. Compound (5) is available from, for example, Tateyama Kasei Co., Ltd.
[0064]
　When the reaction between the compound (4) and the compound (5) is carried out, a base is required to generate the α-position anion in the compound (5). Therefore, for example, sodium hydride, sodium hexamethyldisilazane, lithium hexamethyldisilazane, lithium diisopropylamide, sodium tert-butoxide, potassium tert-butoxide, sodium ethoxydo, sodium methoxydo, sodium hydroxide, potassium hydroxide, etc. It is preferable to carry out the reaction in the presence of a strong base or a weak base such as cesium carbonate, potassium carbonate or sodium carbonate. Above all, it is preferable to carry out the reaction in the presence of bases such as sodium hydride, sodium tert-butoxide, potassium tert-butoxide, sodium ethoxydo, cesium carbonate and potassium carbonate.
[0065]
　The amount of the base used is usually 0.8 times or more the molar amount of the substrate (compound (5)), preferably 0.8 times to 1.2 times the molar amount of the strong base, and the weak base. In the case of, it is 0.8 times to 3 times mol.
[0066]
　The reaction solvent is not particularly limited as long as it dissolves the substrate, but is preferably an aprotonic polar solvent such as dimethylsulfoxide, N, N-dimethylformamide, N, N-dimethylacetamide, or N-methylpyrrolidone. , Alcohol solvents such as methanol, ethanol, propanol and butanol, ether solvents such as tetrahydrofuran, diethyl ether, methyl-tert-butyl ether and methyl cyclopropyl ether, and hydrocarbon solvents such as toluene, hexane and heptane. , A mixed solvent with a halogen-based hydrocarbon solvent such as dichloromethane, chloroform, 1,2-dichloroethane, etc. is used. More preferably, dimethyl sulfoxide, N, N-dimethylformamide, N-methylpyrrolidone, tetrahydrofuran, a mixed solvent of them and toluene, and a mixed solvent of ethanol and toluene are used.
[0067]
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 130 ° C., preferably 20 ° C. to 80 ° C.
[0068]
　The reaction time is not particularly limited, but is usually 1 hour to 24 hours, preferably 1 hour to 5 hours.
[0069]
　It is desirable to add an iodine salt to this step for the purpose of accelerating the reaction and increasing selectivity. As the iodine salt, those represented by MI (M indicates an alkali metal) are preferable, and among them, potassium iodide, sodium iodide and the like are preferable. The amount of these additions is 0.02 times to 1 times mol, preferably 0.2 times to 0.4 times mol, with respect to the substrate (compound (4)).
　The amount of the compound (5) used with respect to the compound (4) is 1 to 2 times mol, preferably 1 to 1.2 times mol, with respect to the compound (4).
[0070]
　Incidentally, in the compound (6), X, and P, and X, and P in the compound (2), R 3 , and A, R in the compound (5) 3 is synonymous with, and A.
[0071]
　Step 3:
　A step of producing the compound represented by the formula (7) (compound (7)) using the compound (6) as a raw material.
[0072]
　　By cyclizing the compound (6), the following
　formula (7)
[Chemical

formula 40] (in the formula, P represents a protective group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents 1 to 4 carbon atoms.
A compound represented by 10 alkyl groups, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 20 carbon atoms is synthesized.
[0073]
　A base is required for this step 3. Examples of the base include sodium hydride, sodium hexamethyldisilazane, lithium hexamethyldisilazane, lithium diisopropylamide, sodium tert-butoxide, potassium tert-butoxide, sodium ethoxydo, sodium methoxyde, sodium hydroxide, hydroxide. Strong bases such as potassium and weak bases such as cesium carbonate, potassium carbonate and sodium carbonate are used, and sodium hydride, sodium tert-butoxide, potassium tert-butoxide, cesium carbonate and potassium carbonate are preferably used.
[0074]
　The amount of base used is usually 1 to 2 times mol or more with respect to the substrate (compound (6)), preferably 1 to 2 times mol to a strong base and 1 to 2 times mol to a weak base. It is 3 times the mole.
　The reaction solvent is not particularly limited as long as it dissolves the substrate (compound (6)), but is preferably dimethylsulfoxide, N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone or the like. Aprotonic polar solvents, ether solvents such as tetrahydrofuran, diethyl ether, methyl-tert-butyl ether and methylcyclopropyl ether, and hydrocarbon solvents such as toluene, hexane and heptane, dichloromethane, chloroform, 1, A mixed solvent with a halogen-based hydrocarbon solvent such as 2-dichloroethane is used, and more preferably, a mixed solvent of N, N-dimethylformamide, N-methylpyrrolidone, tetrahydrofuran, and toluene thereof is used.
[0075]
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 130 ° C., preferably 10 ° C. to 50 ° C. for a strong base and 80 ° C. to 130 ° C. for a weak base.
　The reaction time is not particularly limited, but is usually 1 hour to 24 hours, preferably 1 hour to 6 hours.
[0076]
　This step is preferably carried out in the presence of a quaternary ammonium salt such as tetrabutylammonium bromide for the purpose of accelerating the reaction and increasing selectivity. The amount of these used is 0.02 times to 1 times mol, preferably 0.2 times to 0.4 times mol, relative to the substrate (compound (6)).
[0077]
　Further, it is also possible to carry out the steps 2 and 3 continuously without isolating and purifying the compound (6) in the middle, and in that case, it can be carried out by adding a base after the reaction of the step 2 is completed. ..
　In compound (7), P is synonymous with P and R 3 in the compound (2) , and A is synonymous with R 3 and A in the compound (5) .
[0078]
　In the present invention, (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid is preferably synthesized by the following step 6.
[0079]
　Step 6 is a step of producing the compound represented by the formula (10) (compound (10)) using the compound (9) as a raw material.
[0080]
　The lactone in the compound (9) is hydrolyzed and the amide bond in the compound (9) is cleaved to be represented by the following
　formula (10)
[chemical 41]

(2S, 5S) / (2R, 5R). -5-Hydroxypiperidine-2-carboxylic acid is synthesized.
[0081]
　Hydrolysis of the lactone in compound (9) and cleavage of the amide bond in compound (9) may proceed at the same time.
　Commonly used conditions can be adopted for the rupture of the amide bond. For example, when A is an alkyl group or an aryl group, it can be easily cleaved by acting with a strong acid such as hydrochloric acid or hydrobromic acid as a catalyst in the reaction solvent.
　As the reaction solvent, water or an aqueous solvent such as hydrous dioxane, hydrodimethoxyethane, or water-containing acetone is used.
　The amount of the strong acid used is usually 1 to 10 times mol, preferably 1 to 2 times mol, with respect to compound (9).
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 100 ° C., preferably 80 ° C. to 100 ° C.
　The reaction time is not particularly limited, but is usually 1 hour to 12 hours, preferably 3 hours to 6 hours.
　For hydrolysis of the lactone, an acid or a base is used according to a method generally used for hydrolysis, and for example, hydrochloric acid or sodium hydroxide is used.
　Water, methanol, ethanol and the like are used as the reaction solvent.
[0082]
　The amount of the acid or base used is usually 1 to 10 times the molar amount, preferably 1 to 2 times the molar amount, based on the compound (9) in which the amide bond is cleaved.
[0083]
　The reaction temperature is not particularly limited, but is usually 0 ° C. to 100 ° C., preferably 60 ° C. to 100 ° C.
　The reaction time is not particularly limited, but is usually 1 hour to 12 hours, preferably 8 hours to 12 hours.
[0084]
　In step 6, the compound (9) is represented by the formula (9a)
[Chemical

Formula 42] (in the formula, A'represents an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms).
In the case of, for example, by adding hydrochloric acid and heating, the hydrolysis of the lactone and the hydrolysis of the acetyl group can be carried out at the same time.
　In this case, since the obtained (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid is a hydrochloride, ion exchange is performed according to a method generally adopted for amino acid purification. It can be dehydrochlorinated with a resin. In addition, lithium hydroxide and lithium carbonate are used to neutralize hydrochloric acid to obtain lithium chloride, or triethylamine is used to obtain triethylamine hydrochloride, and after concentration, alcohols, acetone, etc. are added to form lithium chloride or triethylamine hydrochloride. Can be removed.
[0085]
　In compound (9a), A'is an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 10 carbon atoms, preferably an alkyl group having 1 to 3 carbon atoms or an aryl group having 6 carbon atoms. be. The aryl group is, for example, a phenyl group. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group and an octyl group. And so on.
[0086]
　Further, since (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid is crystalline, it can be purified by recrystallization. As the recrystallization solvent, for example, a water-ethanol mixed system, a methanol-acetone mixed system, or the like can be used.
[0087]
　In the present invention, in steps 1 to 5, X in the compounds (1) to (9) is Cl, R 1 and R 3 are ethyl groups, R 2 is a methyl group or p-toluyl group, and A is a methyl group or phenyl. It is preferable that the group and P are a tetrahydropyranyl group or a methoxymethyl group, an ethoxyethyl group, a tert-butyldimethylsilyl group or a tert-butyl group.
　In the present invention, a sulfonic acid ester of an optically active 4-halo-3-protected hydroxybutanol derived from an optically active 4-halo-3-hydroxybutanoic acid ester (Compound (1)) (Compound (4)). And an acylaminomalonic acid diester (compound (5)) are coupled to obtain an optically active 2-acylamino-2- [4-halo-3-protected hydroxybutyl] -malonic acid diester (compound (6)). obtained,
　cyclized this give deprotected to optically active 1-acyl-5-hydroxypiperidine-2,2-dicarboxylic acid diester (compound (8)),
then, after hydrolysis of the ester, ( a) A lactone is formed from one of the 5-position hydroxyl group and the 2-position dicarboxylic acid to decarbonize the remaining carboxylic acid, or (b) decarbonation is performed to obtain a three-dimensional isomer mixture of the 2-position monocarboxylic acid for isomerization. Esteration to give 5-acyl-2-oxa-5-azabicyclo [2.2.2] octane-3-one (Compound (7)), and
　finally by deprotection and hydrolysis (2S). , 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid is preferably produced. As a result, the optically active substance can be efficiently synthesized.
[0088]
[2] Novel Compounds The
　present invention relates to the following novel compounds. These novel compounds are useful as synthetic intermediates for drugs and the like that inhibit β-lactamase.
　The novel compound of the present invention can be produced by the production method of the present invention. In addition, since the structure has been clarified by the present specification, it is also possible to synthesize it by using an ordinary organic chemistry method.
[0089]
(A) A compound represented by the following formula (2a).
[Chemical

formula 43] (In the formula, X represents Cl, Br, or I, R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted, and P'' represents a tetrahydropyranyl group. , Or an ethoxyethyl group.)
　X is Cl, Br, or I, and X is preferably Cl.
　R 1 is a hydrogen atom or an optionally substituted alkyl group having 1 to 4 carbon atoms, and R 1 is preferably an optionally substituted alkyl group having 1 to 4 carbon atoms. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group and the like. Examples of the substituent of the alkyl group include a halogen atom and an alkoxy group.
　P'' is a tetrahydropyranyl group or an ethoxyethyl group.
　Of the compound (2a), a particularly preferable compound is a compound represented by the following formula.
[Chemical 44]

[0090]
(B) A compound represented by the following formula (3a).
[Chemical

formula 45] (In the formula, X represents Cl, Br, or I, and P'represents a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. )
　P'is a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group.
　In addition, in compound (3a), X is synonymous with X in said compound (2a).
[0091]
　Of the compound (3a), a particularly preferable compound is a compound represented by the following formula.
[Changing 46]

[0092]
(C) A compound represented by the following formula (4a).
[Chemical

formula 47] (In the formula, X represents Cl, Br, or I, and P'represents a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. R 2 represents an aryl group having 6 to 12 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms.)
[0093]
　R 2 is an aryl group having 6 to 12 carbon atoms, an alkyl group having 1 to 10 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, and R 2 is preferably an aryl group having 6 to 7 carbon atoms and carbon atoms. It is an alkyl group of 1 to 3 or an aralkyl group having 7 to 11 carbon atoms, more preferably a methyl group. Examples of the aryl group include a phenyl group, a tolyl group, a naphthyl group, a biphenyl group and the like. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group and an octyl group. And so on. Examples of the aralkyl group include a benzyl group and a phenethyl group.
　In compound (4a), X is synonymous with X in the compound (2a) and P'is synonymous with P'in the compound (3a).
[0094]
　Of the compound (4a), a particularly preferable compound is a compound represented by the following formula.
[Chemical 48]

[0095]
(D) A compound represented by the following formula (6a).
[Chemical 49]

(In the formula, X represents Cl, Br, or I, P'shows a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or 7 to 20 carbon atoms. Indicates the aralkyloxy group of.)
[0096]
　R 3 is an alkyl group having 1 to 4 carbon atoms, and R 3 is preferably an alkyl group having 1 to 2 carbon atoms. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group and the like.
　A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 20 carbon atoms, and A is preferably an alkyl group having 7 to 20 carbon atoms. It is an alkyl group of 1 to 3, an aryl group having 6 to 10 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or an aralkyloxy group having 7 to 11 carbon atoms, more preferably a methyl group and a phenyl group. Examples of the aryl group include a phenyl group, a naphthyl group, a biphenyl group and the like. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group and an octyl group. And so on. Examples of the alkyloxy group include a methyloxy group, an ethyloxy group, an n-propyloxy group, an isopropyloxy group, an n-butyloxy group, an isobutyloxy group, a tert-butyloxy group and the like. Examples of the aralkyloxy group include a benzyloxy group and a phenethyloxy group.
　In compound (6a), X is synonymous with X in the compound (2a) and P'is synonymous with P'in the compound (3a).
[0097]
　Of the compound (6a), a particularly preferable compound is a compound represented by the following formula.
[Chemical

formula 50] (In the formula, Ac represents an acetyl group and Bz represents a benzoyl group.)
[0098]
(E) A compound represented by the following formula (7).
[Chemical

formula 51] (In the formula, P represents a protective group, R 3 represents an alkyl group having 1 to 4 carbon atoms, A represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and carbon. It indicates an alkyloxy group having a number of 1 to 4 or an aralkyloxy group having a carbon number of 7 to 20.)
[0099]
　P is a protecting group, preferably a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group.
　In compound (7), R 3 and A are synonymous with R 3 and A in compound (6a) .
[0100]
　Of the compound (7), a particularly preferable compound is a compound represented by the following formula.
[Chemical

formula 52] (In the formula, Ac represents an acetyl group and Bz represents a benzoyl group.)
[0101]
(F) A compound represented by the following formula (8) or a salt of a dicarboxylic acid thereof.
[Chemical

formula 53] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyloxy having 1 to 4 carbon atoms. A group or an aralkyloxy group having 7 to 20 carbon atoms is shown.) In
　the compound (8), R 3 and A are synonymous with R 3 and A in the compound (6a) .
[0102]
　Of the compound (8), a particularly preferable compound is a compound represented by the following formula.
[Chemical

formula 54] (In the formula, Ac represents an acetyl group and Bz represents a benzoyl group.)
　Of these, compound (8a) is crystalline and can be isolated and purified by crystallization, and is intermediate in synthesis. Preferable as a body.
[0103]
(G) A compound represented by the following formula (9a).
[Chemical

formula 55] (In the formula, A'indicates an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms.)
　A'is an alkyl group having 1 to 10 carbon atoms or 6 to 12 carbon atoms. It is an aryl group, and A'is preferably an alkyl group having 1 to 3 carbon atoms or an aryl group having 6 carbon atoms. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group and an octyl group. And so on. Examples of the aryl group include a phenyl group and a naphthyl group.
[0104]
　Of the compound (9a), a particularly preferable compound is a compound represented by the following formula.
[Chemical 56]

(In the formula, Ac represents an acetyl group and Bz represents a benzoyl group.)
[0105]
(H) A compound represented by the following formula (11a) or (11b) or a salt thereof.
[Chemical

formula 57] (In the formula, A'indicates an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms.)
[0106]
[Chemical

formula 58] (In the formula, A'indicates an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms.) In
　the compounds (11a) and (11b), A'is the compound. It is synonymous with A'in (9a).
[0107]
　Of the compounds (11a) and (11b), a particularly preferable compound is a compound represented by the following formula.
[Chemical 59]

Example
[0108]
　Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.
[0109]
[Example 1] Production of (3S) -4-chloro-3- (tetrahydropyran-2-yloxy) -butane-1-ol (compound of X = Cl, P = tetrahydropyranyl group in formula (3))
　In a 50 mL reactor, 1.50 g (9 mmol) of (3S) -4-chloro-3-hydroxybutanoic acid ethyl ester (compound of X = Cl, R 1 = ethyl group in formula (1) ), 1.51 g of dihydropyran. (18 mmol), 29 μL (0.45 mmol) of methanesulfonic acid, and 15 mL of toluene were charged, and after stirring at room temperature for 0.5 hours, 250 μL (1.8 mmol) of triethylamine was added to terminate the reaction. The mixture was washed with water, dried, and then concentrated to concentrate and oily crude (3S) -4-chloro-3- (tetrahydropyran-2-yloxy) -butanoic acid ethyl ester (X = Cl, P = tetrahydro in formula (2)). 3.14 g of a pyranyl group, R 1 = ethyl group compound) was obtained.
[0110]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.23 (3H, m), 1.44-1.85 (6H, m), 2.58-2.80 (2H, m), 3.47-3 .95 (4H, m), 4.17 (2H, m), 4.20-4.37 (1H, m), 4.73-4.80 (1H, m).
[0111]
　Next, the obtained crude (3S) -4-chloro-3- (tetrahydropyran-2-yloxy) -butanoic acid ethyl ester (in formula (2), X = Cl, P = tetrahydropyranyl group, R 1 = Ethyl group compound) is dissolved in 15 mL of dry tetrahydrofuran (hereinafter, "THF"), 0.34 g (9 mmol) of lithium aluminum hydride is added, and the mixture is stirred at 5 ° C. for 2 hours, then 1 mL of ethyl acetate and then 1 mL of water are added. The excess reducing agent was decomposed and the reaction was stopped. The mixture is filtered through Celite, purified by silica gel column chromatography, and oiled (3S) -4-chloro-3- (tetrahydropyran-2-yloxy) -butane-1-ol (X in formula (3)). = Cl, P = compound of tetrahydropyranyl group) 1.43 g (total yield of 2 steps 73%) was obtained.
[0112]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.45-2.08 (8H, m), 3.35-4.13 (8H, m), 4.68-4.76 (1H, m).
[0113]
[Example 2] (3S) -Methanesulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester (in formula (4), X = Cl, P = tetrahydropyranyl group, R 2 = methyl Preparation of Group Compound) In a
　50 mL reactor, (3S) -4-chloro-3- (tetrahydropyran-2-yloxy) -butane-1-ol (X = in formula (3)) obtained in Example 1 was placed. Add 1.43 g (6.8 mmol) of Cl, P = tetrahydropyranyl group compound, 1.05 mL (7.5 mmol) of triethylamine, and 14 mL of toluene, and add 0.56 mL (7.18 mmol) of methanesulfonyl chloride at 5 ° C. Was added, and the mixture was stirred at 5 ° C. for 1 hour. This reaction solution was washed with water, dried, and then concentrated to concentrate, and the oily crude (3S) -methanesulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester (X = Cl in the formula (4), 2.13 g (yield 97%) of P = tetrahydropyranyl group and R 2 = methyl group compound was obtained.
[0114]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.48-1.60 (4H, m), 1.72-1.85 (2H, m), 1.97-2.20 (2H, m), 3 .02 (3H, s), 3.50-4.12 (5H, m), 4.30-4.45 (2H, m), 4.68 (1H, m).
[0115]
[Example 3] (3S) Methansulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester (X = Cl, P = tetrahydropyranyl group, R 2 = methyl group in the formula (4)) compounds) of manufacturing
　a 1L reactor, (3S)-4-chloro-3-hydroxybutanoic acid ethyl ester (formula (1) X = Cl, R in 1 compound of = ethyl) 30g (180.18mmol), 18.16 g (216.22 mmol) of dihydropyran, 0.44 g (1.80 mmol) of pyridinium-p-toluenesulfonate, 240 mL of toluene were charged, and the mixture was stirred at 45 ° C. for 10 hours to obtain (3S) -4-chloro-. A toluene solution of 3- (tetrahydropyran-2-yloxy) -butanoic acid ethyl ester (compound of X = Cl, P = tetrahydropyranyl group, R 1 = ethyl group in the formula (2)) was obtained.
　Next, 70 mL (252.25 mmol) of sodium bismethoxyethoxyaluminum hydride (70% toluene solution) was added to this reaction solution at 5 ° C. to 10 ° C., and the mixture was stirred at 5 ° C. to 10 ° C. for 7 hours. To this reaction solution, 22.7 mL of water, 31.59 g of magnesium sulfate, and 22.7 mL of water are sequentially added at 5 ° C to 10 ° C, stirred at 5 ° C to 10 ° C for 1 hour, and allowed to stand overnight at 5 ° C. After that, the solid content was filtered. Next, the filtrate is washed with saturated brine, dried, concentrated, and (3S) -4-chloro-3- (tetrahydropyran-2-yloxy) -butane-1-ol (X = in formula (3)). A toluene solution of Cl, P = a compound of a tetrahydropyranyl group) was obtained in an amount of 247.39 g. (Total yield of 2 processes 91%)
　This solution ((3S) -4-chloro-3- (tetrahydropyran-2-yloxy) -butane-1-ol (compound of X = Cl, P = tetrahydropyranyl group in formula (3)) 32.59 g To 237.3 g (including 156.33 mmol), 17.37 g (171.96 mmol) of triethylamine was added, and 18.79 g (164.15 mmol) of methanesulfonyl chloride was added at 5 ° C to 12 ° C, and 5 ° C to 10 ° C. Was stirred for 1 hour. This reaction solution is washed with water, dried, concentrated, and crude (3S) -methanesulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester (X = Cl, P = in the formula (4)). 51.72 g (pure content 43.92 g) (total yield of 3 steps: 89%) was obtained (compound of tetrahydropyranyl group, R 2 = methyl group).
[0116]
[Example 4-1] (3S) -Methanesulfonic acid 4-chloro-3-methoxymethyloxy-butyl ester ( Compound of X = Cl, P = methoxymethyl group, R 2 = methyl group in the formula (4) ) manufacturing
　in 50mL reactor, (3S)-4-chloro-3-hydroxybutanoic acid ethyl ester (X = Cl, R in formula (1) 1 a compound of = ethyl group) 1.50 g (9.01 mmol), diisopropyl 2.02 mL (11.71 mmol) of ethylamine and 15 mL of toluene were charged, 1.18 g (11.71 mmol) of methoxymethyl chloride was added at room temperature, and the mixture was stirred at room temperature. After completion of the reaction, the reaction solution was washed with water, dried, concentrated, and crude (3S) -4-chloro-3-methoxymethyloxy-butanoic acid ethyl ester (Compound (2) (X = Cl, P = methoxymethyl group). , R 1 = ethyl group compound) 2.54 g was obtained.
[0117]
1 1 H-NMR (400MHz, CDCl 3 ) δ1.26 (3H, t, J = 7.6Hz), 2.60-2.75 (2H, m), 3.38 (3H, s), 3.67 (2H, d, J = 5.2Hz), 4.15 (2H, q, J = 7.3Hz), 4.23 (1H, m), 4.71 (2H, dd, J = 6.8, 22Hz).
[0118]
　Then, to 2.54 g of this crude (3S) -4-chloro-3-methoxymethyloxy-butanoic acid ethyl ester (compound of X = Cl, P = methoxymethyl group, R 1 = ethyl group in the formula (2) ). It was dissolved in 14 mL of toluene, 2.75 mL (9.91 mmol) of sodium bismethoxyethoxyaluminum hydride (70% toluene solution) was added at 5 ° C to 10 ° C, and the mixture was stirred at 5 ° C to 10 ° C for 1 hour. To this reaction solution, 1.8 mL of water, 0.56 g of sodium sulfate and 0.68 g of magnesium sulfate were sequentially added at 5 ° C to 10 ° C, stirred at 5 ° C to 10 ° C for 1 hour, and the solid content was filtered. Next, the filtrate is washed with saturated brine, dried, concentrated, and (3S) -4-chloro-3-methoxymethyloxy-butane-1-ol (X = Cl, P = methoxy in formula (3)). A toluene solution of a methyl group compound) was obtained.
[0119]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.78.1.95 (2H, m), 3.43 (3H, s), 3.58-3.67 (2H, m), 3.98 (1H) , M), 4.74 (2H, dd, J = 7.2, 24Hz).
[0120]
　Then, 1.57 mL (11.29 mmol) of triethylamine was added to this solution, 0.83 mL (10.72 mmol) of methanesulfonyl chloride was added at 5 ° C to 10 ° C, and the mixture was stirred at 5 ° C to 10 ° C for 1 hour. This reaction solution was washed with water, dried, and then concentrated to concentrate (3S) -methanesulfonic acid 4-chloro-3-methoxymethyloxy-butyl ester (in formula (4), X = Cl, P = methoxymethyl group, R 2). = 1.39 g of (methyl group compound) (total yield of 3 steps: 62%) was obtained.
[0121]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.98-2.15 (2H, m), 3.01 (3H, s), 3.40 (3H, s), 3.59-3.68 (2H) , M), 3.92 (1H, m), 4.36 (1H, m), 4.71 (2H, dd, J = 8, 13.6Hz).　
[0122]
[Example 4-2] (3S) Methansulfonic acid 4-chloro-3- (1-ethoxyethyloxy) -butyl ester (X = Cl, P = ethoxyethyl group, R 2 = methyl group in the formula (4)) compounds) of manufacturing
　a 1L reactor, (3S)-4-chloro-3-hydroxybutanoic acid ethyl ester (formula (1) in X = Cl, R 1 compound of = ethyl group) 5.02 g (30.13Mmol ), Ethyl vinyl ether 2.39 g (33.14 mmol), pyridinium-p-toluenesulfonate 0.08 g (0.30 mmol), and toluene 25 mL, and stirred at 40 ° C. for 3 hours to (3S) -4-. A toluene solution of chloro-3- (1-ethoxyethyloxy) -butanoic acid ethyl ester (compound of X = Cl, P = ethoxyethyl group, R 1 = ethyl group in the formula (2)) was obtained.
[0123]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.18-1.36 (9H, m), 2.58-2.77 (2H, m), 3.23-3.75 (4H, m), 4 .10-4.35 (3H, m), 4.82 (1H, m).
[0124]
　Next, 70 mL (252.25 mmol) of sodium bismethoxyethoxyaluminum hydride (70% toluene solution) was added to this reaction solution at 5 ° C. to 10 ° C., and the mixture was stirred at 5 ° C. to 10 ° C. for 1 hour. To this reaction solution, 3.25 mL of water, 9.53 g of magnesium sulfate, and 3.25 mL of water were sequentially added at 5 ° C to 10 ° C, stirred at 5 ° C to 10 ° C for 4 hours, and the solid content was filtered. Next, the filtrate is washed with saturated brine, dried, concentrated, and (3S) -4-chloro-3- (1-ethoxyethyloxy) -butane-1-ol (X = Cl in formula (3)). , P = ethoxyethyl group compound) in a toluene solution (5.81 g) (pure content: 5.44 g) was obtained. (Total yield of 2 processes 92%)
[0125]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.117-1.29 (3H, m), 1.30-1.37 (3H, m), 1.61-1.72 (0.6H, m) , 1.80-2.00 (2H, m), 3.02 (0.4H, m), 3.50-3.90 (6H, m), 3.92-4.08 (1H, m) , 4.79-4.86 (1H, m).
[0126]
　This solution ((3S) -4-chloro-3- (1-ethoxyethyloxy) -butane-1-ol (compound of X = Cl, P = ethoxyethyl group in formula (3)) is then 4.16 g (21). To 4.44 g (containing .17 mmol), 20 mL of toluene and 2.35 g (23.29 mmol) of triethylamine are added, 2.55 g (22.23 mmol) of methanesulfonyl chloride is added at 5 ° C to 15 ° C, and 5 ° C to 10 is added. The mixture was stirred at ° C. for 0.5 hour. This reaction solution is washed with water, dried, concentrated, and crude (3S) -methanesulfonic acid 4-chloro-3- (1-ethoxyethyloxy) -butyl ester (X = Cl, P = ethoxy in the formula (4)). A toluene solution of ethyl group (compound of ethyl group and R 2 = methyl group) was obtained in an amount of 10.83 g (pure content: 5.33 g) (yield 92%).
[0127]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.20 (3H, t, J = 5.9 Hz), 1.32 (3H, d, J = 7.4 Hz), 1.92-2.19 (2H, 2H, m), 2.99 (3H, s), 3.43-3.71 (4H, m), 3.88 (0.5H, m), 4.02 (0.5H, m), 4.26 -4.40 (2H, m), 4.78 (1H, m).
[0128]
[Example 4-3] (3S) -methanesulfonic acid 4-chloro-3-tert-butyldimethylsilyloxy-butyl ester (X = Cl, P = tert-butyldimethylsilyl group in formula (4), R 2 (= Methyl group compound) production In a
　50 mL reactor, 5.00 g ( 3S) -4-chloro-3-hydroxybutanoic acid ethyl ester (X = Cl, R 1 = ethyl group compound in formula (1) ) ( 30.01 mmol), 3.06 g (45.02 mmol) of imidazole, 25 mL of dichloromethane, and tert-butyldimethylsilyl chloride 5.88 g (39.01 mmol) methoxymethyl chloride 1.18 g (11.71 mmol) under ice-cooling. Was added, and the mixture was stirred at room temperature. After completion of the reaction, the reaction solution was washed with water, saturated with water, dried, and then concentrated to concentrate, and crude (3S) -4-chloro-3-tert-butyldimethylsilyloxy-butanoic acid ethyl ester (Compound (2) (X =). 8.01 g of Cl, P = tert-butyldimethylsilyl group, R 1 = ethyl group compound) was obtained (yield 95%).
[0129]
1 1 H-NMR (400MHz, CDCl 3 ) δ0.05 (3H, s), 0.11 (3H, s), 0.88 (9H, s), 1.26 (3H, t, J = 7.4Hz ), 2.49-2.73 (2H, m), 3.52 (2H, s), 4.14 (2H, m), 4.31 (1H, m).
[0130]
　Then, the crude (3S) -4-chloro-3-tert-butyldimethylsilyloxy-butanoic acid ethyl ester (X = Cl, P = tert-butyldimethylsilyl group, R 1 = ethyl group in the formula (2)) 2. The mixture was stirred for 5 hours. To this reaction solution, 2.05 mL of acetic acid and 5.55 mL of water were sequentially added at 5 ° C to 10 ° C, stirred at room temperature for 0.5 hours, and the solid content was filtered. Next, the filtrate is washed with saturated brine, dried, concentrated, and (3S) -4-chloro-3-tert-butyldimethylsilyloxy-butane-1-ol (X = Cl in formula (3), A toluene solution of P = tert-butyldimethylsilyl group) was obtained in an amount of 4.66 g (pure content: 4.28 g). (Yield 63%)
[0131]
1 1 H-NMR (400 MHz, CDCl 3 ) δ0.14 (6H, s), 0.92 (9H, s), 1.80-2.01 (3H, m), 3.52 (2H, m), 3.81 (2H, m), 4.10 (1H, m).
[0132]
　Next, 23 mL of toluene and 2.17 mL (21.46 mmol) of triethylamine were added to this solution, 2.35 g (20.49 mmol) of methanesulfonyl chloride was added at 5 ° C to 10 ° C, and the mixture was stirred at 5 ° C to 10 ° C for 1 hour. bottom. This reaction solution is washed with water, dried, and then concentrated to concentrate (3S) -methanesulfonic acid 4-chloro-3-tert-butyldimethylsilyloxy-butyl ester (X = Cl, P = tert-butyl in formula (4)). butyldimethylsilyl group, R 2 to give a toluene solution 6.09g of = compound of methyl group) (pure content 5.46 g) (96% yield).
[0133]
1 1 H-NMR (400 MHz, CDCl 3 ) δ0.10 (6H, s), 0.89 (9H, s), 1.90-1.99 (1H, m), 2.06-2.17 (1H) , M), 3.02 (3H, s), 3.47 (2H, m), 4.03 (1H, m), 4.28-4.40 (2H, m).
[0134]
[Example 4-4] (3S) -Methanesulfonic acid 4-Chloro-3-tert-butyloxy-butyl ester ( Compound of X = Cl, P = tert-butyl group, R 2 = methyl group in the formula (4)) ) In a
　100 mL reactor, 7.51 g (45.11 mmol) of (3S) -4-chloro-3-hydroxybutanoic acid ethyl ester (compound of X = Cl, R 1 = ethyl group in formula (1) ). 18 mL of n-hexane was charged, 0.47 g (4.51 mmol) of concentrated sulfuric acid and 6.17 g (110.07 mmol) of isobutylene were added under ice-cooling, and the mixture was stirred at 30-35 ° C. for 18 hours. The reaction mixture was then washed with saturated layered water, dried, concentrated, and purified by silica gel chromatography to obtain (3S) -4-chloro-3-tert-butyloxy-butanoic acid ethyl ester (Compound (2) (X = Cl, A compound of P = tert-butyl group and R 1 = ethyl group) was obtained in an amount of 4.92 g (yield 49%).
[0135]
1 1 H-NMR (400MHz, CDCl 3 ) δ1.20 (9H, s), 1.28 (3H, t, J = 8Hz), 2.51-2.76 (2H, m), 3.48-3 .60 (2H, m), 4.15 (3H, m).
[0136]
　Next, 4.92 g of this crude (3S) -4-chloro-3-tert-butyloxy-butanoic acid ethyl ester (compound of X = Cl, P = tert-butyl group, R 1 = ethyl group in the formula (2) ). (22.11 mmol) was dissolved in 25 mL of toluene, 8 mL (28.74 mmol) of sodium bismethoxyethoxyaluminum hydride (70% toluene solution) was added at 5 ° C to 15 ° C, and the mixture was stirred at 5 ° C to 10 ° C for 2 hours. .. To this reaction solution, 0.77 mL of ethanol, 3.41 g of citrate, and 20 mL of water were sequentially added at 5 ° C to 10 ° C, stirred at 5 ° C to 10 ° C for 0.5 hours, and the separated organic phase was saturated salt. After washing with water, drying, concentrating, and purifying by silica gel chromatography, (3S) -4-chloro-3-tert-butyloxy-butane-1-ol (X = Cl, P = tert in the formula (3)). -Butyl group compound) 3.29 g was obtained. (Yield 82%)
[0137]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.25 (9H, s), 1.80-1.88 (1H, m), 1.94-2.03 (1H, m), 2.58 (1H) , Brm), 3.44-3.56 (2H, m), 3.75 (1H, m), 3.83 (1H, m), 3.96 (1H, m).
[0138]
　Then, 2.25 g (12.47 mmol) of (3S) -4-chloro-3-tert-butyloxy-butane-1-ol (compound of X = Cl, P = tert-butyl group in the formula (3)) was obtained. Toluene (23 mL) and triethylamine (2.24 mL (16.21 mmol)) were added, 1.01 mL (13.09 mmol) of methanesulfonyl chloride was added at 5 ° C to 10 ° C, and the mixture was stirred at 5 ° C to 10 ° C for 2 hours. This reaction solution is washed with water, dried, and then concentrated to concentrate (3S) -methanesulfonic acid 4-chloro-3-tert-butyloxy-butyl ester (in formula (4), X = Cl, P = tert-butyl group, R). A toluene solution of 2 = methyl group compound) was obtained in an amount of 4.23 g (pure content: 3.19 g) (yield: 99%).
[0139]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.23 (9H, s), 1.88-1.96 (1H, m), 2.12-2-21 (1H, m), 3.02 (3H) , S), 3.39-3.57 (2H, m), 3.86 (1H, m), 4.35 (2H, m).
[0140]
[Example 4-5] (3S) -p-toluenesulfonic acid 4-chloro-3-methoxymethyloxy-butyl ester (in formula (4), X = Cl, P = methoxymethyl group, R 2 = p -toluene) Preparation of Group Group
　) (3S) -4-chloro-3-methoxymethyloxy-butane-1-ol (X = Cl, P = methoxymethyl group in formula (3)) obtained according to Example 4. Compound) To 2.22 g (pure 2.00 g 11.86 mmol), 9 mL of toluene and 1.00 g (13.10 mmol) of pyridine were added, and 2.40 g (12.50 mmol) of p-toluenesulfonyl chloride was added at room temperature. 29 mg (0.24 mmol) of 4-dimethylaminopyridine was added, and the mixture was stirred at 40 ° C. for 16 hours. This reaction solution is washed with water, dried, concentrated, purified by silica gel chromatography, and (3S) -p-toluenesulfonic acid 4-chloro-3-methoxymethyloxy-butyl ester (X = in the formula (4)). 1.75 g (46% yield) of Cl, P = methoxymethyl group, R 2 = p-toluene group compound) was obtained.
[0141]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.88-2.03 (2H, m), 2.46 (3H, s), 3.35 (3H, s), 3.53-3.66 (2H) , M), 3.87 (1H, m), 4.09-4.20 (4H, m), 4.61 (2H, m), 7.35 (2H, d, J = 8.4Hz), 7.79 (2H, d, J = 8.4Hz).
[0142]
[Example 4-6] (3S) -p-toluenesulfonic acid 4-chloro-3- (1-ethoxyethyloxy) -butyl ester (X = Cl, P = ethoxyethyl group, R 2 in the formula (4)) = Production of p-toluyl group compound)
　obtained according to Example 4-2 (3S) -4-chloro-3- (1-ethoxyethyloxy) -butane-1-ol (formula (3)). In 1.31 g (pure content 6.23 mmol) of X = Cl, P = ethoxyethyl group compound), 6.1 mL of toluene, 0.69 g (6.85 mmol) of triethylamine, and 1.19 g (6) of p-toluenesulfonyl chloride. .23 mmol) and 0.76 g (6.23 mmol) of 4-dimethylaminopyridine were added, and the mixture was stirred at 40 ° C. for 33 hours. This reaction solution is washed with water, dried, concentrated, purified by silica gel chromatography, and (3S) -p-toluenesulfonic acid 4-chloro-3- (1-ethoxyethyloxy) -butyl ester (formula (4)). ), 0.95 g (pure content 0.44 g) (yield 20% ) of X = Cl, P = ethoxyethyl group, R 2 = p-toluyl group compound) was obtained.
[0143]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.12-1.38 (6H, m), 1.80-2.10 (2H, m), 2.43 (3H, s), 3.40-3 .85 (4H, m), 3.93-4.23 (3H, m), 4.80 (1H, m), 7.36 (2H, m), 7.80 (2H, m).
[0144]
[Example 5] (3S) -2-Acetylamino-2- [4-chloro-3- (tetrahydropyran-2-yloxy) -butyl] malonate diethyl ester (X = Cl, P = in formula (6)) Preparation of tetrahydropyranyl group, R 3 = ethyl group, A = methyl group compound) In a
　20 mL reactor, acetaminomalonic acid diethyl ester (R 3 = ethyl group, A = methyl group compound in formula (5) ) 0.10 g (0.46 mmol) and 1 mL of toluene were charged, 180 μL (0.46 mmol) of 20% sodium ethoxide was added, and the mixture was stirred at 25 ° C. for 1.5 hours. To this, the crude (3S) -methanesulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester obtained in Example 2 (X = Cl, P = tetrahydropyranyl in the formula (4)). Group, R 2 = methyl group compound) 0.15 g (pure 0.13 g, 0.46 mmol) in 0.5 mL of toluene and 0.08 g (0.46 mmol) of potassium iodide, 1 mL of ethanol at 25 ° C. In addition, it was heated and refluxed overnight. Ethyl acetate is added to this reaction solution, washed with water, dried, concentrated, purified by silica gel column chromatography, and (3S) -2-acetylamino-2- [4-chloro-3- (tetrahydropyran-2). -Iloxy) -butyl] malonic acid diethyl ester (compound of X = Cl, P = tetrahydropyranyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 0.12 g (yield 63%) Obtained.
[0145]
[Example 6] (3S) -2-Acetylamino-2- [4-chloro-3- (tetrahydropyran-2-yloxy) -butyl] malonic acid diethyl ester (X = Cl, P = in formula (6)) Preparation of tetrahydropyranyl group, R 3 = ethyl group, A = methyl group compound)
　Acetaminomalonic acid diethyl ester (R 3 = ethyl group, A = methyl group compound in formula (5)) in a 50 mL reactor. 0.68 g (3.15 mmol) and 3.4 mL of N, N-dimethylformamide were charged, 0.29 g (3.00 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 30 ° C. for 1 hour. To this, the crude (3S) -methanesulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester obtained in Example 3 (X = Cl, P = tetrahydropyranyl in the formula (4)). group, R 2 = compound of methyl group) 1.01 g (pure content 0.86 g, 3.00 mmol) in toluene 4mL solution and potassium iodide 0.10g of (0.6 mmol) was added at 30 ° C. of the 60 ° C. Stirred for 7.5 hours. This reaction solution was washed with water, dried, and then concentrated to concentrate crude (3S) -2-acetylamino-2- [4-chloro-3- (tetrahydropyran-2-yloxy) -butyl] malonate diethyl ester (formula (formula). In 6), 1.22 g (pure content 1.01 g) (yield 83%) of a compound of X = Cl, P = tetrahydropyranyl group, R 3 = ethyl group, and A = methyl group was obtained.
[0146]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.25 (6H, m), 1.15-1.83 (8H, m), 2.03 (3H, s), 2.30-2.50 (2H) , M), 3.47-3.95 (5H, m), 4.20-4.30 (4H, m), 4.61 and 4.72 (1H, m), 6.80 (1H, brs) ).
[0147]
[Example 7-1] (3S) -2-Acetylamino-2- (4-chloro-3-methoxymethyloxy-butyl) malonic acid diethyl ester (X = Cl, P = methoxymethyl group in the formula (6)) , R 3 = ethyl group, A = methyl group compound) 0.49 g (
　R 3 = ethyl group, A = methyl group compound in formula (5)) in a 30 mL reactor. 2.27 mmol) and 2.5 mL of dimethyl sulfoxide were charged, 0.23 g (2.38 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 30 ° C. for 2 hours. To this, the crude (3S) -methanesulfonic acid 4-chloro-3-methoxymethyloxy-butyl ester obtained in Example 4 (X = Cl, P = methoxymethyl group, R 2 = methyl in the formula (4)). A 2.5 mL solution of 0.56 g (2.27 mmol) of the group compound) and 0.08 g (0.45 mmol) of potassium iodide were added at 30 ° C., and the mixture was stirred at 80 ° C. for 5 hours. 200 μL of this reaction solution is taken out, ethyl acetate is added, the mixture is washed with water, dried, and then concentrated to concentrate (3S) -2-acetylamino-2- (4-chloro-3-methoxymethyloxy-butyl) malonic acid diethyl ester (formula). In (6), 25 mg (yield 94%) of a compound of X = Cl, P = methoxymethyl group, R 3 = ethyl group, and A = methyl group was obtained.
[0148]
1 1 H-NMR (400MHz, CDCl 3 ) δ1.23 (6H, t, J = 5.2Hz), 1.33-1.50 (2H, m), 2.01 (3H, s), 2.30 -2.46 (2H, m), 3.36 (3H, s), 3.55 (2H, d, J = 5.2Hz), 3.67 (1H, m), 4.21 (4H, q) , J = 7.3Hz), 4.64 (2H, dd, J = 7.2, 18Hz), 6.77 (1H, brs).
[0149]
[Example 7-2] (3S) -2-Acetylamino-2- (4-chloro-3- (1-ethoxyethyloxy) -butyl) malonic acid diethyl ester (X = Cl, P in formula (6)) Preparation of = ethoxyethyl group, R 3 = ethyl group, A = methyl group compound) In a
　50 mL reactor, acetaminomalonic acid diethyl ester (R 3 = ethyl group, A = methyl group compound in formula (5) ) 4.95 g (22.82 mmol) and 22 mL of N, N-dimethylformamide were charged, 2.15 g (22.40 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 1.5 hours. To this, the crude (3S) -methanesulfonic acid 4-chloro-3- (1-ethoxyethyloxy) -butyl ester obtained in Example 4-2 (X = Cl, P = ethoxyethyl in the formula (4)). Add 10.83 g (pure 5.33 g 19.41 mmol) of toluene solution ( group, R 2 = methyl group compound), 4 mL of toluene, and 0.69 g (4.16 mmol) of potassium iodide at 40 ° C. to 80. The mixture was stirred at ° C. for 2 hours. Toluene is added to this reaction solution, washed with water, dried, and then concentrated to concentrate (3S) -2-acetylamino-2- (4-chloro-3- (1-ethoxyethyloxy) -butyl) malonate diethyl ester (3S). In the formula (6), 7.64 g (pure content 7.14 g, yield 93%) of a compound of X = Cl, P = ethoxyethyl group, R 3 = ethyl group, and A = methyl group was obtained.
[0150]
1 1 H-NMR (400MHz, CDCl 3 ) δ1.15-1.32 (12H, m), 1.30-1.60 (2H, m), 2.03 (3H, s), 2.30-2 .52 (2H, m), 3.47-3.83 (5H, m), 4.23 (4H, q, J = 7.0Hz), 4.73 and 4.81 (1H, m), 6 .78 (1H, brs).
[0151]
[Example 7-3] (3S) -2-Acetylamino-2- (4-chloro-3-tert-butyldimethylsilyloxy-butyl) malonic acid diethyl ester (X = Cl, P = in formula (6)) Preparation of tert-butyldimethylsilyl group, R 3 = ethyl group, A = methyl group compound) In a
　50 mL reactor, acetaminomalonic acid diethyl ester (R 3 = ethyl group, A = methyl group in formula (5)) 1.15 g (5.29 mmol) of compound) and 6.8 mL of N, N-dimethylformamide were charged, 0.50 g (5.19 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 1 hour. To this, the crude (3S) -methanesulfonic acid 4-chloro-3-tert-butyldimethylsilyloxy-butyl ester obtained in Example 4-3 (X = Cl, P = tert-butyl in the formula (4)) Add 1.70 g (pure 1.52 g 4.81 mmol) of toluene solution (compound of dimethylsilyl group, R 2 = methyl group), 1 mL of toluene, and 0.16 g (0.96 mmol) of potassium iodide at 40 ° C. , 80 ° C. for 4 hours. Toluene is added to this reaction solution, washed with water, dried, and then concentrated to concentrate (3S) -2-acetylamino-2- (4-chloro-3-tert-butyldimethylsilyloxy-butyl) malonic acid diethyl ester (formula). In (6), 2.10 g (a compound of X = Cl, P = tert-butyldimethylsilyl group, R 3 = ethyl group, A = methyl group) (pure 1.77 g, yield 84%) was obtained.
[0152]
1 1 H-NMR (400MHz, CDCl 3 ) δ0.09 (6H, s), 0.90 (9H, s), 1.24 (6H, t, J = 7.5Hz), 1.29-1.55 (2H, m), 2.02 (3H, s), 2.30-2.50 (2H, m), 3.42 (2H, m), 3.83 (1H, m), 4.25 ( 4H, m), 6.75 (1H, brs).
[0153]
[Example 7-4] (3S) -2-Acetylamino-2- (4-chloro-3-tert-butyloxy-butyl) malonic acid diethyl ester (X = Cl, P = tert-butyl in the formula (6)) group, R 3 = ethyl, a = compound of methyl group) of production
　in 50mL reactor, R in acetaminophen malonic acid diethyl ester (formula (5) 3 = ethyl, compound of a = methyl group) 0.87 g (4.00 mmol), 4.3 mL of N, N-dimethylformamide was charged, 0.38 g (3.92 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 1 hour. To this, the crude (3S) -methanesulfonic acid 4-chloro-3-tert-butyloxy-butyl ester obtained in Example 4-4 (X = Cl, P = tert-butyl group, R in the formula (4)). 1.25 g (pure 0.94 g 3.64 mmol) of a toluene solution ( 2 = methyl group compound), 2 mL of toluene, and 0.12 g (0.73 mmol) of potassium iodide were added at 40 ° C. and at 80 ° C. Stirred for 2 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, and purified by silica gel chromatography (3S) -2-acetylamino-2- (4-chloro-3-tert-butyloxy-butyl) malon. 1.06 g (pure content 0.95 g, yield 69%) of acid diethyl ester (compound of X = Cl, P = tert-butyl group, R 3 = ethyl group, A = methyl group in the formula (6) ) was obtained. ..
[0154]
1 1 H-NMR (400MHz, CDCl 3 ) δ1.19 (9H, s), 1.25 (6H, t, J = 7.2Hz), 1.30-1.38 (1H, m), 1.49 -1.59 (1H, m), 2.03 (3H, s), 2.30-2.47 (2H, m), 3.33-3.49 (2H, m), 3.65 (1H) , M), 4.27 (4H, q, J = 7.2Hz), 6.78 (1H, brs).
[0155]
[Example 7-5] (3S) -2-Acetylamino-2- (4-chloro-3-methoxymethyloxy-butyl) malonic acid diethyl ester (X = Cl, P = methoxymethyl group in formula (6) , R 3 = ethyl group, A = methyl group compound) 1.04 g (
　R 3 = ethyl group, A = methyl group compound in formula (5)) in a 50 mL reactor. 4.81 mmol), 5.4 mL of N, N-dimethylformamide was charged, 0.45 g (4.72 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 1 hour. To this, the crude (3S) -p-toluenesulfonic acid 4-chloro-3-methoxymethyloxy-butyl ester obtained in Example 4-5 (X = Cl, P = methoxymethyl group in the formula (4), R 2 = p-toluene group compound) 1.80 g (pure 1.41 g 4.37 mmol) in 5.1 mL of toluene and 0.15 g (0.87 mmol) of potassium iodide were added at 40 ° C. to 80 ° C. Was stirred for 2 hours. Tolu is added toluene, washed with water, dried, and then concentrated to concentrate (3S) -2-acetylamino-2- (4-chloro-3-methoxymethyloxy-butyl) malonic acid diethyl ester (in the formula (6)). 2.08 g (pure 1.45 g, yield 90%) of a compound of X = Cl, P = methoxymethyl group, R 3 = ethyl group, and A = methyl group was obtained.
[0156]
[Example 8-1] (3S) -2-benzoylamino-2- [4-chloro-3- (tetrahydropyran-2-yloxy) -butyl] malonate diethyl ester (X = Cl in formula (6), Preparation of P = tetrahydropyranyl group, R 3 = ethyl group, A = phenyl group compound) In a
　30 mL reactor, benzoylaminomalonic acid diethyl ester (R 3 = ethyl group, A = phenyl group in formula (5)) 0.38 g (1.37 mmol) of compound) and 1.9 mL of N, N-dimethylformamide were charged, 0.13 g (1.37 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at room temperature for 1 hour. To this, the crude (3S) -methanesulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester obtained in Example 3 (X = Cl, P = tetrahydropyranyl in the formula (4)). group, R 2 = compound of methyl group) 0.51 g (pure content 0.39 g, 1.37 mmol) in toluene 1.9mL solution and potassium iodide 0.09g of (0.55 mmol) was added at room temperature, 80 ° C. Was stirred for 1 hour. A small amount of this reaction solution is taken out, washed with water by adding toluene, dried, and concentrated to be crude (3S) -2-benzoylamino-2- [4-chloro-3- (tetrahydropyran-2-yloxy) -butyl]. 27 mg of malonate diethyl ester (compound of X = Cl, P = tetrahydropyranyl group, R 3 = ethyl group, A = phenyl group in the formula (6) ) was obtained.
[0157]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.20 (6H, m), 1.32-1.80 (8H, m), 1.97-2.20 (1H, m), 2.40-2 .57 (1H, m), 3.16-3.92 (5H, m), 4.20 (4H, m), 4.52 and 4.65 (1H, m), 7.30 (3H, m) ), 7.80 (2H, m).
[0158]
[Example 8-2] (3S) -2-benzoylamino-2- [4-chloro-3- (methoxymethyloxy-butyl] malonic acid diethyl ester (X = Cl, P = methoxymethyl in the formula (6)) group, R 3 = ethyl, a = compound of phenyl groups) of production
　in 50mL reactor, R in benzoylamino malonic acid diethyl ester (formula (5) 3 = ethyl, compound of a = phenyl group) 1.87 g (6.69 mmol), 5.7 mL of N, N-dimethylformamide was charged, 0.63 g (6.57 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 1 hour. The obtained crude (3S) -methanesulfonic acid 4-chloro-3- (tetrahydropyran-2-yloxy) -butyl ester (X = Cl, P = methoxymethyl group, R 2 = methyl group in the formula (4) A 6 mL solution of 1.50 g (6.08 mmol) of toluene and 0.20 g (1.22 mmol) of potassium iodide were added at 40 ° C., and the mixture was stirred at 80 ° C. for 2 hours. Tone was added to this reaction solution. After washing with water, drying, and concentrating, crude (3S) -2-benzoylamino-2- [4-chloro-3-methoxymethyloxy-butyl] malonic acid diethyl ester (X = Cl, P = in the formula (6)) 2.83 g (pure content 2.20 g, yield 84%) of a compound having a methoxymethyl group, R 3 = ethyl group, and A = phenyl group was obtained.
[0159]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.26 (6H, t, J = 7.5 Hz), 1.20-1.85 (8H, m), 2.45-2.65 (2H, m) , 3.40-3.92 (5H, m), 4.29 (4H, m), 4.60 and 4.71 (1H, m), 7.42-7.55 (4H, m), 7 .82 (2H, m).
[0160]
[Example 8-3] (3S) -2-benzoylamino-2- [4-chloro-3- (1-ethoxyethyloxy) -butyl] malonic acid diethyl ester (X = Cl, P in formula (6)) Preparation of = ethoxyethyl group, R 3 = ethyl group, A = phenyl group compound) In a
　30 mL reactor, benzoylaminomalonic acid diethyl ester (R 3 = ethyl group, A = phenyl group compound in formula (5) ) 2.31 g (8.27 mmol) and 8 mL of N, N-dimethylformamide were charged, 0.78 g (8.12 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 2 hours. To this, crude (3S) -methanesulfonic acid 4-chloro-3- (1-ethoxyethyloxy) -butyl ester obtained according to Example 4-2 (X = Cl, P = in the formula (4)). 2.06 g (pure 1.99 g, 7.52 mmol) of 2.06 g (compound of ethoxyethyl group, R 2 = methyl group) in 4 mL of toluene and 0.25 g (1.50 mmol) of potassium iodide were added at 40 ° C. to 80. The mixture was stirred at ° C. for 4.5 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, purified by silica gel chromatography, and (3S) -2-benzoylamino-2- [4-chloro-3- (1-ethoxyethyloxy). ) -Butyl] malonate diethyl ester (compound of X = Cl, P = ethoxyethyl group, R 3 = ethyl group, A = phenyl group in formula (6) ) was obtained in 2.31 g. (Yield 67%)
[0161]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.13-1.35 (12H, m), 1.40-1.63 (2H, m), 2.45-2.65 (2H, m), 3 .43-3.83 (5H, m), 4.30 (4H, m), 4.72 and 4.80 (1H, m), 7.43-7.58 (4H, m), 7.83 (2H, m).
[0162]
[Example 8-4] (3S) -2-benzoylamino-2- [4-chloro-3-tert-butyldimethylsilyloxy-butyl] malonic acid diethyl ester (X = Cl, P = in formula (6)) Preparation of tert-butyldimethylsilyl group, R 3 = ethyl group, A = phenyl group compound) In a
　30 mL reactor, benzoylaminomalonic acid diethyl ester (R 3 = ethyl group, A = phenyl group in formula (5)) 1.48 g (5.29 mmol) of compound) and 6.8 mL of N, N-dimethylformamide were charged, 0.50 g (5.19 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 1 hour. To this, the crude (3S) -methanesulfonic acid 4-chloro-3-tert-butyldimethylsilyloxy-butyl ester obtained in Example 4-3 (X = Cl, P = tert-butyl in the formula (4)) butyldimethylsilyl group, R 2 = compound of methyl group) 1.70 g (pure content 1.52 g, 4.81 mmol) in toluene 1mL solution and potassium iodide 0.16g of (0.96 mmol) was added at 40 ° C. of 80 The mixture was stirred at ° C. for 4.5 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, and crude (3S) -2-benzoylamino-2- [4-chloro-3-tert-butyldimethylsilyloxy-butyl] malonic acid diethyl ester. ( Compound of X = Cl, P = tert-butyldimethylsilyl group, R 3 = ethyl group, A = phenyl group in the formula (6) ) was obtained in an amount of 2.68 g. (Pure content 1.95 g Yield 81%)
[0163]
1 1 H-NMR (400MHz, CDCl 3 ) δ0.10 (6H, s), 0.90 (9H, s), 1.30 (6H, t, J = 8.3Hz), 1.35-1.65 (2H, m), 2.48-2.65 (2H, m), 3.43 (2H, m), 3.85 (1H, m), 4.33 (4H, m), 7.45- 7.60 (4H, m), 7.84 (2H, m).
[0164]
[Example 8-5] (3S) -2-benzoylamino-2- [4-chloro-3-tert-butyloxy-butyl] malonic acid diethyl ester (X = Cl, P = tert-butyl in formula (6)) group, R 3 = ethyl, a = compound of phenyl groups) of production
　in 50mL reactor, benzoylamino malonic acid diethyl ester (formula (5) in R 3 = ethyl, compound of a = phenyl group) 1.12 g (4.00 mmol), 4.4 mL of N, N-dimethylformamide was charged, 0.38 g (3.92 mmol) of sodium-tert-butoxide was added, and the mixture was stirred at 40 ° C. for 1 hour. To this, the crude (3S) methanesulfonic acid 4-chloro-3-tert-butyloxy-butyl ester obtained in Example 4-4 (X = Cl, P = tert-butyl group, R 2 in the formula (4)). = Methyl group compound) 1.25 g (pure 0.94 g, 3.64 mmol) in 2 mL of toluene and 0.12 g (0.73 mmol) of potassium iodide were added at 40 ° C and stirred at 80 ° C for 2 hours. bottom. Toluene is added to this reaction solution, washed with water, dried, concentrated, purified by silica gel chromatography, and (3S) -2-benzoylamino-2- [4-chloro-3-tert-butyloxy-butyl]. 1.24 g of malonic acid diethyl ester (compound of X = Cl, P = tert-butyl group, R 3 = ethyl group, A = phenyl group in the formula (6) ) was obtained. (Pure content 1.10 g Yield 69%)
[0165]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.16 (9H, s), 1.25-1.29 (7H, m), 1.31-1.42 (1H, m), 2.48-2 .57 (2H, m), 3.34-3.49 (2H, m), 3.65 (1H, m), 4.28 (4H, q, J = 6.8Hz), 7.44-7 .53 (4H, m), 7.81 (2H, m).
[0166]
[Example 9] (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (P = tetrahydropyranyl group in formula (7), R 3 = Preparation of (Ethyl Group, A = Methyl Group Compound) In a
　100 mL reactor, the crude (3S) -2-acetylamino-2- [4-chloro-3- (tetrahydropyran-2-yloxy) obtained in Example 5 ) was placed. ) -Butyl] malonic acid diethyl ester (compound of X = Cl, P = tetrahydropyranyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 5.08 g (pure 4.35 g, 10. 68 mmol), 40 mL of dimethylformamide, and 10.44 g (32.04 mmol) of cesium carbonate were charged, and the mixture was stirred at 100 ° C. for 7 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, and crude (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy) -piperidine-2,2-dicarboxylic acid diethyl ester (formula (formula). In 7), 4.18 g (yield 94% ) of P = tetrahydropyranyl group, R 3 = ethyl group, and A = methyl group compound was obtained.
[0167]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.15-1.25 (6H, m), 1.32-1.95 (8H, m), 1.95-2.10 (1H, m), 2 .10 (3H, s), 2.40-2.50 (1H, m), 3.02 and 3.22 (1H, m), 3.43 (1H, m), 3.55-3.70 (1H, m), 3.72-3.88 (2H, m), 4.10-4.25 (4H, m), 4.65 (1H, m).
[0168]
[Example 10] (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (P = tetrahydropyranyl group in formula (7), R 3 = Preparation of (Ethyl Group, A = Methyl Group Compound) In a
　100 mL reactor, the crude (3
S) -2-acetylamino-2- [4-chloro-3- (tetrahydropyran-2-) obtained in Example 5 ) was placed. Iloxy) -butyl] malonic acid diethyl ester (compound of X = Cl, P = tetrahydropyranyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 5.77 g (pure 4.95 g, 12) .14 ​​mmol), 58 mL of dimethylformamide was charged, 1.52 g (15.78 mmol) of sodium-tert-butoxide was charged in 3 portions at 15 ° C. over 3 hours, and the mixture was stirred at 15 ° C. for 2 hours. 0.22 mL of acetic acid is added to this reaction solution to neutralize the excess base, toluene is added, the mixture is washed with water, dried, concentrated, and crude (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy). -Piperidin-2,2-dicarboxylic acid diethyl ester (compound of P = tetrahydropyranyl group, R 3 = ethyl group, A = methyl group in formula (7) ) 3.85 g (pure 2.77 g, yield 62) %) Was obtained.
[0169]
[Example 11-1] (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (P = tetrahydropyranyl group in formula (7), R Preparation of 3 = Ethyl Group, A = Methyl Group Compound) In a
　10 mL reactor, the crude (3S) -2-acetylamino-2- [4-chloro-3- (tetrahydropyran-2) obtained in Example 5 ) was placed. -Iloxy) -butyl] malonic acid diethyl ester (compound of X = Cl, P = tetrahydropyranyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 0.53 g (pure 0.5 g, 1.23 mmol) and 2.7 mL of dimethylformamide were charged, potassium carbonate (1.23 mmol) and tetrabutylammonium bromide (hereinafter, “TBAB”) (1.227 mmol) were charged, and the mixture was stirred at 100 ° C. for 15 hours.
　Toluene is added, washed with saline, dried, concentrated, and (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (formula (7)). Obtained 0.61 g (pure content: 0.37 g, yield: 80%) of P = tetrahydropyranyl group, R 3 = ethyl group, and A = methyl group compound.
[0170]
[Example 11-2] (5S) -1-acetyl-5-methoxymethyloxy-piperidine-2,2-dicarboxylic acid diethyl ester (P = methoxymethyl group, R 3 = ethyl group, A in formula (7)) = Preparation of methyl group compound) In a
　50 mL reactor, crude (3S) -2-acetylamino-2- [4-chloro-3-methoxymethyloxy-butyl] diethyl malonate obtained according to Example 7 Ester (compound of X = Cl, P = methoxymethyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 1.41 g (pure 1.12 g, 3.04 mmol), dimethylformamide 5.3 mL , 2.97 g (9.12 mmol) of cesium carbonate was charged, and the mixture was stirred at 100 ° C. for 3 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, and crude (5S) -1-acetyl-5-methoxymethyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (P = in formula (7)). 0.95 g (pure content 0.87 g, yield 87%) of a compound of methoxymethyl group, R 3 = ethyl group, and A = methyl group was obtained.
[0171]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.27-1.31 (6H, m), 1.50-1.59 (1H, m), 1.80-1.90 (1H, m), 2 .08-2.17 (1H, m), 2.17 (3H, s), 2.48-2.55 (1H, m), 3.28-3.40 (1H, m), 3.40 (3H, s), 3.63 (1H, m), 3.76 (1H, m), 4.18-4.30 (4H, m), 4.71 (2H, m).
[0172]
[Example 11-3] (5S) -1-acetyl-5- (1-ethoxyethyloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (in formula (7), P = ethoxyethyl group, R 3 = Preparation of Ethyl Group, A = Methyl Group Compound) In a
　100 mL reactor, the crude (3S) -2-acetylamino-2- [4-chloro-3- (1-ethoxyethyl) obtained in Example 7-2 ) was placed. Oxy) -butyl] malonic acid diethyl ester (compound of X = Cl, P = ethoxyethyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 7.64 g (pure 7.14 g, 18. (06 mmol), 17.1 mL of dimethylformamide was charged, and 853 mg (21.40 mmol) of 60% sodium hydride was added in portions at 40 ° C. over 5 hours. To this reaction solution, 0.43 mL of acetic acid and toluene were added, washed with water, washed with 2% potassium carbonate, dried, concentrated, and crude (5S) -1-acetyl-5- (1-ethoxyethyloxy) -piperidin-2. , 2-Dicarboxylic acid diethyl ester (compound of P = ethoxyethyl group, R 3 = ethyl group, A = methyl group in the formula (7) ) was obtained in an amount of 5.64 g (pure content: 5.31 g, yield: 77%).
[0173]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.20-1.35 (12H, m), 1.35-1.50 (1H, m), 1.90 (1H, m), 2.03-2 .12 (1H, m), 2.14 (3H, s), 2.47-2.55 (1H, m), 3.02-3.15 and 3.44-3.86 (5H, m) , 4.20-4.35 (4H, m), 4.81 (1H, m).
[0174]
[Example 11-4] (5S) -1-acetyl-5-tert-butyldimethylsilyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (P = tert-butyldimethylsilyl group in formula (7), R Preparation of 3 = Ethyl Group, A = Methyl Group Compound) In a
　50 mL reactor, the crude (3S) -2-acetylamino-2- [4-chloro-3-tert-butyl obtained in Example 7-3 ) was placed. Dimethylsilyloxy-butyl] malonic acid diethyl ester (compound of X = Cl, P = tert-butyldimethylsilyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 2.10 g (pure content 1. 77 g (4.05 mmol), 8.4 mL of dimethylformamide, and 3.96 g (12.15 mmol) of cesium carbonate were charged, and the mixture was stirred at 100 ° C. for 3 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, purified by silica gel chromatography, and (5S) -1-acetyl-5-tert-butyldimethylsilyloxy-piperidin-2,2-dicarboxylic acid. 1.18 g (pure 1.13 g, yield 70%) of a diethyl ester (compound of P = tert-butyldimethylsilyl group, R 3 = ethyl group, A = methyl group in the formula (7) ) was obtained.
[0175]
1 1 H-NMR (400 MHz, CDCl 3 ) δ0.09 (3H, s), 0.10 (3H, s), 0.90 (9H, s), 1.25-1.30 (6H, m), 1.30-1.40 (1H, m), 1.75-1.85 (1H, m), 2.03-2.10 (1H, m), 2.15 (3H, s), 2. 49-2.58 (1H, m), 3.02 (1H, dd, J = 10.6, 12.1Hz), 3.58 (1H, dd, J = 3.0, 12.1Hz), 3 .83 (1H, m), 4.17-4.31 (4H, m).
[0176]
[Example 11-5] (5S) -1-acetyl-5-tert-butyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (in formula (7), P = tert-butyl group, R 3 = ethyl group, Preparation of A = Methyl Group Compound)
　Crude (3S) -2-acetylamino-2- [4-chloro-3-tert-butyloxy-butyl] malonic acid obtained in Example 7-4 in a 50 mL reactor. Diethyl ester (compound of X = Cl, P = tert-butyl group, R 3 = ethyl group, A = methyl group in formula (6) ) 1.06 g (pure content 0.95 g, 2.50 mmol), dimethylformamide 4 mL , 2.44 g (7.50 mmol) of cesium carbonate was charged, and the mixture was stirred at 100 ° C. for 4 hours. Toluene is added to this reaction solution, washed with water, dried, and then concentrated to concentrate (5S) -1-acetyl-5-tert-butyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (P = tert in the formula (7)). -Butyl group, R 3 = ethyl group, A = methyl group compound) 0.73 g (pure content 0.64 g, yield 75%) was obtained.
[0177]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.22 (9H, s), 1.25-1.32 (6H, m), 1.35 (1H, m), 1.83-1.87 (1H) , M), 2.00-2.07 (1H, m), 2.15 (3H, s), 2.50-2.56 (1H, m), 2.85-2.91 (1H, m) ), 3.63-3.66 (2H, m), 4.20-4.27 (4H, m).
[0178]
[Example 11-6] (5S) -1-benzoyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (P = tetrahydropyranyl group in formula (7), R Preparation of 3 = Ethyl Group, A = Phenyl Group Compound) In a
　50 mL reactor, crude (3S) 2-benzoylamino-2- [4-chloro-3- (tetrahydropyran-) obtained according to Example 8). 2-Iloxy) -butyl] malonic acid diethyl ester (compound of X = Cl, P = tetrahydropyranyl group, R 3 = ethyl group, A = phenyl group in formula (6) ) 3.09 g (6.57 mmol), 12 mL of dimethylformamide and 6.42 g (19.71 mmol) of cesium carbonate were charged, and the mixture was stirred at 100 ° C. for 4.5 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, purified by silica gel chromatography, and (5S) -1-benzoyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-. 2.08 g (pure 1.88 g, yield 66%) of a dicarboxylic acid diethyl ester (compound of P = tetrahydropyranyl group, R 3 = ethyl group, A = phenyl group in the formula (7) ) was obtained.
[0179]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.23-1.35 (6H, m), 1.43-1.95 (8H, m), 2.22-2.31 (1H, m), 2 .57-2.69 (1H, m), 3.22-3.89 (5H, m), 4.22-4.32 (4H, m), 4.50 and 4.69 (1H, m) 7.40 (3H, m), 7.53-7.61 (2H, m).
[0180]
[Example 11-7] (5S) -1-benzoyl-5-methoxymethyloxy-piperidine-2,2-dicarboxylic acid diethyl ester (P = methoxymethyl group, R 3 = ethyl group, A in formula (7)) = Preparation of phenyl group compound)
　Crude (3S) 2-benzoylamino-2- [4-chloro-3-methoxymethyloxy) -butyl] malon obtained according to Example 8-2 in a 50 mL reactor. Acid diethyl ester (compound of X = Cl, P = methoxymethyl group, R 3 = ethyl group, A = phenyl group in formula (6) ) 1.42 g (pure 1.10 g 2.56 mmol), dimethylformamide 5. 2 mL and 2.50 g (7.68 mmol) of cesium carbonate were charged, and the mixture was stirred at 100 ° C. for 3 hours. Toluene is added to this reaction solution, washed with water, dried, and then concentrated to concentrate (5S) -1-benzoyl-5-methoxymethyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (P = methoxy in the formula (7)). A compound of methyl group, R 3 = ethyl group, and A = phenyl group) was obtained in an amount of 0.99 g (pure content: 0.93 g, yield: 92%).
[0181]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.29-1.34 (6H, m), 1.58-1.68 (1H, m), 1.81-1.90 (1H, m), 2 .21-2.30 (1H, m), 2.55-2.65 (1H, m), 3.20-3.30 (1H, m), 3.28 (3H, s), 3.40 (1H, m), 3.58 (1H, dd, J = 3.2, 14.0Hz), 3.75 (1H, m), 4.20-4.39 (4H, m), 4.54 and 4.63 (1H, d, J = 7.2Hz), 7.42 (3H, m), 7.55 (2H, m).
[0182]
[Example 11-8] (5S) -1-benzoyl-5- (1-ethoxyethyloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (in formula (7), P = ethoxyethyl group, R 3 = Preparation of Ethyl Group, A = Phenyl Group Compound) In a
　50 mL reactor, the (3S) -2-benzoylamino-2- [4-chloro-3- (1-ethoxyethyloxy) obtained in Example 8-3 ) was placed. ) -Butyl] malonic acid diethyl ester (compound of X = Cl, P = ethoxyethyl group, R 3 = ethyl group, A = phenyl group in formula (6) ) 2.31 g (5.04 mmol), dimethylformamide 9. 2 mL and 4.93 g (15.12 mmol) of cesium carbonate were charged, and the mixture was stirred at 100 ° C. for 5 hours. Toluene is added to this reaction solution, washed with water, dried, and then concentrated to concentrate (5S) -1-benzoyl-5- (1-ethoxyethyloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (formula (7)). , P = ethoxyethyl group, R 3 = ethyl group, A = phenyl group compound) 0.92 g (yield 43%) was obtained.
[0183]
1 1 H-NMR (400 MHz, CDCl 3 ) δ0.99-1.10 (3H, m), 1.17-1.35 (9H, m), 1.45-1.60 (1H, m), 1 .83-1.92 (1H, m), 2.18-2.26 (1H, m), 2.57-2.65 (1H, m), 3.11 (1H, m), 4.20 -4.33 (4H, m), 4.61 and 4.73 (1H, m), 7.40 (3H, m), 7.52 (2H, m).
[0184]
[Example 11-9] (5S) -1-benzoyl-5-tert-butyldimethylsilyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (P = tert-butyldimethylsilyl group in formula (7), R Preparation of 3 = Ethyl Group, A = Phyl Group Compound) In a
　50 mL reactor, the (3S) -2-benzoylamino-2- [4-chloro-3-tert-butyldimethyl obtained in Example 8-4 ) was placed. Cyriloxy-butyl] malonic acid diethyl ester (compound of X = Cl, P = tert-butyldimethylsilyl group, R 3 = ethyl group, A = phenyl group in formula (6) ) 2.68 g (pure 1.95 g) 3.91 mmol), 10.7 mL of dimethylformamide, and 3.82 g (11.73 mmol) of cesium carbonate were charged, and the mixture was stirred at 100 ° C. for 3 hours. Toluene is added to this reaction solution, washed with water, dried, concentrated, purified by silica gel chromatography, and (5S) -1-benzoyl-5-tert-butyldimethylsilyloxy-piperidin-2,2-dicarboxylic acid. 1.70 g (pure 1.45 g, yield 80%) of a diethyl ester (compound of P = tert-butyldimethylsilyl group, R 3 = ethyl group, A = phenyl group in the formula (7) ) was obtained.
[0185]
1 1 H-NMR (400MHz, CDCl 3 ) δ0.02 (3H, s), 0.03 (3H, s), 0.90 (9H, s), 1.32 (6H, m), 1.50- 1.59 (1H, m), 1.77-1.85 (1H, m), 2.20-2.30 (1H, m), 2.62-2.70 (1H, m), 3. 16 (1H, dd, J = 6.9, 12.0Hz), 3.50 (1H, dd, J = 1.7, 13.7Hz), 3.83 (1H, m), 4.23-4 .37 (4H, m), 4.65 (1H, m), 7.42 (3H, m), 7.58 (2H, m).
[0186]
[Example 11-10] (5S) -1-benzoyl-5-tert-butyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (in formula (7), P = tert-butyl group, R 3 = ethyl group, Preparation of A = phenyl group compound) In a
　50 mL reactor, the (3S) -2-benzoylamino-2- [4-chloro-3-tert-butyloxy-butyl] diethyl malonate obtained in Example 8-5 was placed. Ester (compound of X = Cl, P = tert-butyl group, R 3 = ethyl group, A = phenyl group in formula (6) ) 1.24 g (pure 1.10 g 2.50 mmol), dimethylformamide 5 mL, carbonic acid 2.44 g (7.50 mmol) of cesium was charged, and the mixture was stirred at 100 ° C. for 4 hours. Toluene is added to this reaction solution, washed with water, dried, and then concentrated to concentrate (5S) -1-benzoyl-5-tert-butyloxy-piperidin-2,2-dicarboxylic acid diethyl ester (P = tert in the formula (7)). -Butyl group, R 3 = ethyl group, A = phenyl group compound) 1.06 g (pure content 0.84 g, yield 83%) was obtained.
[0187]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.11 (9H, s), 1.28-1.33 (6H, m), 1.42 (1H, m), 1.80-1.86 (1H) , M), 2.17-2.24 (1H, m), 2.60-2.66 (1H, m), 2.94-2.99 (1H, m), 3.56-3.63 (2H, m), 4.26-4.31 (4H, m), 7.38-7.43 (3H, m), 7.54 (2H, m).
[0188]
[Example 12-1] (5S) Preparation of -1-acetyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = methyl group in formula (8))
　In a 100 mL reactor, the crude (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester obtained in Example 10 (P = in formula (7)) 4.18 g (10.68 mmol) of tetrahydropyranyl group, R 3 = ethyl group, A = methyl group compound, 20 mL of methanol and 19 μL of concentrated hydrochloric acid were charged, and the mixture was stirred at room temperature for 4 hours. 45 μL of triethylamine was added to this reaction solution to terminate the reaction, and methanol was concentrated under reduced pressure to obtain 3.7 g of an oily substance. Next, this oil is dissolved in 20 mL of toluene, 10 mL of n-heptane is added at room temperature to precipitate crystals, and 10 mL of n-heptane is further added and aged at room temperature, the crystals are filtered, and the n-heptane is washed. 2.30 g ( 5S) -1-acetyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group, A = methyl group in formula (8)). (Yield 75%) was obtained.
[0189]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.20-1.30 (6H, m), 1.40-1.52 (1H, m), 1.80-1.90 (1H, m), 2 .09-2.15 (1H, m), 2.15 (3H, s), 2.40-2.50 (1H, m), 3.23 (1H, dd, J = 7.6, 14. 4Hz), 3.57 (1H, dd, J = 4.8, 12.8Hz), 3.92 (1H, m), 4.17-4.32 (4H, m).
[0190]
[Example 12-2] (5S) Preparation of -1-acetyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = methyl group in formula (8))
　In a 50 mL reactor, the crude (5S) -1-acetyl-5- (1-ethoxyethyloxy) -piperidin-2,2-dicarboxylic acid diethyl ester obtained in Example 11-3 (P in formula (7)) = Ethoxyethyl group, R 3 = ethyl group, A = methyl group compound) 1.45 g (pure 1.28 g 3.57 mmol), 7.25 mL of methanol and 10 μL of concentrated hydrochloric acid were charged and stirred at room temperature for 4 hours. .. This reaction solution is concentrated under reduced pressure, purified by silica gel chromatography, and (5S) -1-acetyl-5-hydroxy-piperidine-2,2-dicarboxylic acid diethyl ester (R 3 = ethyl group in the formula (8)). , A = methyl group compound) 0.79 g (yield 77%) was obtained.
[0191]
[Example 12-3] Preparation of (5S) -1-acetyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = methyl group in formula (8))
　In a 10 mL reactor, the crude (5S) -1-acetyl-5-tert-tert-butyldimethylsilyloxy-piperidin-2,2-dicarboxylic acid diethyl ester obtained in Example 11-4 (in formula (7)) Add 355 mg (compound of P = tert-butyldimethylsilyl group, R 3 = ethyl group, A = methyl group), 2 mL of methanol and 20 μL of 20% hydrochloric acid, and stir at room temperature for 28.5 hours. bottom. This reaction solution is concentrated under reduced pressure, purified by silica gel chromatography, and (5S) -1-acetyl-5-hydroxy-piperidine-2,2-dicarboxylic acid diethyl ester (R 3 = ethyl group in the formula (8)). , A = methyl group compound) 171 mg (yield 70%) was obtained.
[0192]
[Example 12-4] Preparation of (5S) -1-acetyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group, A = methyl group in formula (8))
　In a 10 mL reactor, the crude (5S) -1-acetyl-5-tert-butyloxy-piperidin-2,2-dicarboxylic acid diethyl ester obtained in Example 11-5 (P = tert-butyl in formula (7)) Group, R 3 = ethyl group, A = methyl group compound) 0.30 mg (pure 0.26 g 0.77 mmol), 1 mL of toluene and 0.5 mL of trifluoroacetic acid were charged and stirred at room temperature for 48.5 hours. .. 1 mL of triethylamine was added to this reaction solution, purified by silica gel chromatography, and (5S) -1-acetyl-5-hydroxy-piperidine-2,2-dicarboxylic acid diethyl ester (R 3 = ethyl in formula (8)). 0.14 g (yield 64%) of a group (compound of A = methyl group) was obtained.
[0193]
[Example 12-5] Preparation of (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = phenyl group in formula (8))
　In a 50 mL reactor, in the crude (5S) -1-benzoyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (formula (7)) obtained in Example 11-6. 2.08 g (pure 1.88 g 4.33 mmol) of P = tetrahydropyranyl group, R 3 = ethyl group, A = phenyl group, 10 mL of methanol and 20 μL of concentrated hydrochloric acid were charged and stirred at room temperature for 6 hours. .. 100 μL of triethylamine was added to this reaction solution to terminate the reaction, methanol was concentrated under reduced pressure, purified by silica gel chromatography, and (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester. ( Compound of R 3 = ethyl group and A = phenyl group in the formula (8) ) 1.59 g (pure content 1.46 g, yield 97%) was obtained.
[0194]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.29-1.35 (6H, m), 1.50-1.65 (1H, m), 1.82-1.90 (1H, m), 2 .05 (1H, brass), 2.25-2.33 (1H, m), 2.56-2.62 (1H, m), 3.30 (1H, dd, J = 6.8, 13. 6Hz), 3.50 (1H, dd, J = 3.2, 14.0Hz), 3.89 (1H, m), 4.21-4.38 (4H, m), 7.42 (3H, 3H, m), 7.52 (2H, m).
[0195]
[Example 12-6] Preparation of (5S) -1-benzoyl-5-hydroxy-piperidine-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = phenyl group in formula (8))
　In a 50 mL reactor, the crude (5S) -1-benzoyl-5-methoxymethyloxy-piperidine-2,2-dicarboxylic acid diethyl ester obtained in Example 11-7 (P = methoxymethyl group in formula (7)) , R 3 = ethyl group, A = phenyl group compound) 0.38 g (pure content 0.36 g 0.92 mmol), 5 mL of methanol and 50 μL of concentrated hydrochloric acid were charged, and the mixture was stirred at 70 ° C. for 4.5 hours. This reaction solution was concentrated under reduced pressure, and (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (R 3 = ethyl group, A = phenyl group compound in formula (8) ) 0. .30 g (pure content 0.29 g, yield 91%) was obtained.
[0196]
[Example 12-7] Preparation of (5S) -1-benzoyl-5-hydroxy-piperidine-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = phenyl group in formula (8))
　In a 50 mL reactor, the crude (5S) -1-benzoyl-5- (1-ethoxyethyloxy) -piperidin-2,2-dicarboxylic acid diethyl ester obtained in Example 11-8 (P in formula (7)) 0.86 g (2.03 mmol) of = ethoxyethyl group, R 3 = ethyl group, A = phenyl group compound), 4 mL of methanol and 10 μL of concentrated hydrochloric acid were charged, and the mixture was stirred at room temperature for 4 hours. 100 μL of triethylamine was added to this reaction solution to terminate the reaction, methanol was concentrated under reduced pressure, purified by silica gel chromatography, and (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester. ( Compound of R 3 = ethyl group and A = phenyl group in the formula (8) ) 0.68 g (pure content 0.60 g, yield 85%) was obtained.
[0197]
[Example 12-8] Preparation of (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = phenyl group in formula (8))
　In a 50 mL reactor, the crude (5S) 1-benzoyl-5-tert-butyldimethylsilyloxy-piperidin-2,2-dicarboxylic acid diethyl ester obtained in Example 11-9 (P = tert in formula (7)) 383 mg (compound of butyldimethylsilyl group, R 3 = ethyl group, A = phenyl group), 2 mL of methanol and 50 μL of 20% hydrochloric acid were charged, and the mixture was stirred at room temperature for 28.5 hours. Then, methanol was concentrated under reduced pressure and purified by silica gel chromatography to obtain (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (R 3 = ethyl group in formula (8) , A = phenyl group compound) 269 mg (pure content 226 mg, yield 91%) was obtained.
[0198]
[Example 12-9] Preparation of (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (compound of R 3 = ethyl group and A = phenyl group in formula (8))
　In a 50 mL reactor, the crude (5S) -1-benzoyl-5-tert-butyloxy-piperidin-2,2-dicarboxylic acid diethyl ester obtained in Example 11-10 (P = tert-butyl in formula (7)) 0.29 g (pure 0.23 g 0.57 mmol) of group, R 3 = ethyl group, A = phenyl group compound), 1 mL of toluene and 0.5 mL of trifluoroacetic acid were charged and stirred at room temperature for 48.5 hours. .. Then, ethyl acetate was added, and the mixture was washed with saturated layered water, concentrated, and purified by silica gel chromatography to obtain (5S) -1-benzoyl-5-hydroxy-piperidin-2,2-dicarboxylic acid diethyl ester (in the formula (8)). 0.03 g (yield 15%) of R 3 = ethyl group and A = phenyl group compound was obtained.
[0199]
[Example 13] Preparation of (2S, 5S) -5-acetyl-2-oxa-5-azabicyclo [2.2.2] octane-3-one (A = methyl group compound in formula (9))
　200 mL In the reactor of Example 10, crude (5S) -1-acetyl-5- (tetrahydropyran-2-yloxy) -piperidin-2,2-dicarboxylic acid diethyl ester (P = in formula (7)) obtained in Example 10. 8.7 g (23.45 mmol) of tetrahydropyranyl group, R 3 = ethyl group, A = methyl group compound), 44 mL of methanol, 43.5 mL of toluene and 0.24 g of 35% hydrochloric acid were charged and stirred at room temperature for 3 hours. Then, a solution of (5S) -1-acetyl-5-hydroxypiperidine-2,2-dicarboxylic acid diethyl ester (R 3 = ethyl group, A = methyl group compound in the formula (8) ) in methanol and toluene was obtained. .. 3.75 g of sodium hydroxide was added to this reaction solution, and the mixture was stirred for 3 hours, and methanol was distilled off under reduced pressure to prepare a toluene solution. Next, 21.1 g of acetic acid and 12.0 g of acetic anhydride were added thereto, and the mixture was stirred at 50 ° C. for 1 hour. Further, 0.47 g of triethylamine was added, the temperature was raised to 70 ° C., and the mixture was stirred for 5 hours. The reaction mixture was cooled to 30 ° C., 15 mL of toluene was added, the precipitated sodium acetate was removed by filtration, the filtrate was concentrated, and (2S, 5S) -5-acetyl-2-oxa-5-azabicyclo. [2.2.2] Toluene-3-one (A = methyl group compound in the formula (9)) was obtained in an amount of 2.83 g (yield 96%).
[0200]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.78-2.23 (4H, m), 2.06and 2.12 (3H, s), 3.55 (1H, t, J = 12.4Hz), 3. 65-3.77 (1H, m), 4.38 and 5.19 (1H, m), 4.83-4.90 (1H, m).
[0201]
[Example 14-1] (2S, 5S) -5-Acetyl-2-oxa-5-azabicyclo [2.2.2] Octane-3-one (A = methyl group compound in formula (9)) In a
　500 mL reactor produced, the (5S) -1-acetyl-5-hydroxypiperidine-2,2-dicarboxylic acid diethyl ester obtained in Example 12 (R 3 = ethyl group, A = methyl in formula (8)) (Group compound) 38.1 g (132.8 mmol), 190 mL of methanol, 21.2 g of sodium hydroxide were charged, and the mixture was stirred at 50 ° C. for 3 hours to (5S) -1-acetyl-5-hydroxypiperidine-2, A methanol solution of 2-dicarboxylic acid disodium salt (compound (8) (R 3 = Na, A = methyl group compound) was prepared. 119.5 g of acetic acid and 1.3 g of triethylamine were added to this reaction solution at 95 ° C. The mixture was stirred for 1 hour to prepare an acetate-methyl mixed solution of a diastereomer mixture of (5S) -1-acetyl-5-hydroxypiperidine-2-carboxylic acid (Compounds (11c, 11d)).
[0202]
(2R, 5S) -1-acetyl-5-hydroxypiperidine-2-carboxylic acid
1 1 H-NMR (400 MHz, D 2 O) δ1.50-1.70 (2 H, m), 1.85-2.10 (2H, m) 2.03 and 2.10 (3H, s), 2.81 (0.3H, d, J = 8.9Hz), 3.35 (0.7H, d, J = 8.9Hz) ), 3.75 (0.7H, d, J = 8.9Hz), 3.98 (1H, m), 4. 26 (0.3H, d, J = 8.9Hz), 4.66 (0.3H, m), 5. 08 (0.7H, m)
[0203]
(2S, 5S) -1-acetyl-5-hydroxypiperidine-2-carboxylic acid
1 1 H-NMR (400 MHz, D 2 O) δ1.23-1.36 (1 H, m), 1.59-1.81 (1H, m), 1.98 (1H, m), 2.10 and 2.19 (3H, s), 2.24-2.36 (1H, m), 2.54 (0.4H, t) , J = 12.6Hz), 3.03 (0.6H, dd, J = 10.7 and 13.3Hz), 3.55-3.65 (0.6H, m), 3.67-3. 76 (0.8H, m), 3.92 (0.6H, dd, J = 5.3 and 13.3Hz) 4.44 (0.6H, m), 4.47 (0.4H, m) , 4.94 (0.6H, m)
[0204]
　Then, methanol was distilled off under reduced pressure, 108 g of acetic anhydride was added, and the mixture was stirred at 100 ° C. for 3 hours. The reaction mixture was cooled to 30 ° C., 190 mL of toluene was added, the precipitated sodium acetate was removed by filtration, and the filtrate was concentrated to produce crude (2S, 5S) -5-acetyl-2-oxa-5-. 2.83 g (72% yield) of azabicyclo [2.2.2] octane-3-one (compound of A = methyl group in formula (9)) was obtained.
[0205]
[Example 14-2] (2S, 5S) -5-benzoyl-2-oxa-5-azabicyclo [2.2.2] Octane-3-one (A = phenyl group compound in formula (9)) In a
　30 mL reactor produced, the (5S) 1-benzoyl-5-hydroxypiperidine-2,2-dicarboxylic acid diethyl ester obtained according to Example 12-5 (R 3 = ethyl group in formula (8) , 1.29 g (3.68 mmol) of A = phenyl group compound), 6.5 mL of methanol and 0.29 g (7.36 mmol) of sodium hydroxide were charged, heated and refluxed for 2 hours, and 0.15 g (3) of sodium hydroxide was further charged. .68 mmol) was added and heated to reflux for 14.5 hours, then the inorganic salt produced as pH 1 was filtered off with an aqueous sulfuric acid solution under ice-cooling, sodium hydroxide was added to adjust the pH to 2, and then methanol and water were concentrated. A white solid of a diastereomer mixture of (5S) -1-benzoyl-5-hydroxypiperidin-2-carboxylic acid (Compounds (11e, 11f)) was prepared.
[0206]
(2R, 5S) -1-benzoyl-5-hydroxypiperidin-2-carboxylic acid
1 1 H-NMR (400 MHz, D 2 O) δ1.33-1.85 (2H, m), 2.20 (2H, m) ), 3.12 (0.5H, d, J = 15.0Hz), 3.40 (0.5H, m), 3.50-3.90 (1H, m), 4.09 (0.5H) , Brs), 4. 47 (0.5H, m), 4.60 (0.5H, d, J = 15.0Hz), 5. 46 (0.5H, m), 7.40-7.50 (5H, m).
[0207]
(2S, 5S) -1-benzoyl-5-hydroxypiperidin-2-carboxylic acid
1 H-NMR (400 MHz, D 2 O) δ1.33-1.46 (1H, m), 1.65 (0.4H) , M), 1.81 (0.6H, m), 2.02 (1H, m), 2.30 (0.4H, m), 2.43 (0.6H, m), 2.72 ( 0.4H, t, J = 12.0Hz), 3.03 (0.6H, t, J = 12.0Hz), 3.58 (0.6H, m), 3.65 (0.4H, m) ), 3.80 (0.6H, m), 4.40 (0.4H, m), 4.65 (0.4H, m), 5.40 (0.6H, m), 7.40 ( 5H, m).
[0208]
　Then, 1.32 mL (22.08 mmol) of acetic acid, 5.2 mL of toluene, 0.04 g (0.37 mmol) of triethylamine, and 0.57 g (6.38 mmol) of acetic anhydride were added, and the mixture was stirred at 90 ° C. for 2.5 hours. .. This reaction solution was concentrated, toluene was added to remove the precipitated sodium acetate by filtration, the filtrate was concentrated, purified by silica gel chromatography, and (2S, 5S) -5-benzoyl-2-oxa. 0.76 g (pure content 0.65 g, yield 76%) of -5-azabicyclo [2.2.2] octane-3-one (compound of A = phenyl group in formula (9)) was obtained.
[0209]
1 1 H-NMR (400 MHz, CDCl 3 ) δ1.88-2.30 (4H, m), 3.70 (1H, m), 3.90 (1H, m), 4.45 and 4.79 (1H) , Brs), 4.98 and 5.27 (1H, brs), 7.45 (5H, m).
[0210]
[Example 15] Preparation of (2S, 5S) -5-hydroxypiperidine-2-carboxylic acid (Compound (10)) The
　crude (2S, 5S) -5-acetyl obtained in Example 13 was placed in a 200 mL reactor. -2-Oxa-5-azabicyclo [2.2.2] octane-3-one (A = methyl group compound in formula (9)) 6.36 g (37.59 mmol), 2 mol / L hydrochloric acid 93.98 mL ( 187.97 mmol) was charged, and the mixture was stirred at 90 ° C. for 3 hours. After concentrating this reaction solution, it was dissolved again in water (42.9 mL) and adsorbed on a strong acid cation exchange resin (88.69 mL). The resin was washed with water, eluted with aqueous ammonia, and the fraction was concentrated to obtain a crude (2S, 5S) -5-hydroxy-piperidine-2-carboxylic acid (compound (10)).
[0211]
　The obtained crude (2S, 5S) -5-hydroxy-piperidin-2-carboxylic acid (compound (10)) was dissolved in water (10 mL), 0.26 g of activated carbon was added, and the mixture was stirred at 40 ° C. for 2 hours. The reaction mixture is filtered, concentrated, and ethanol is added to the residue to obtain crude crystals, which are then recrystallized from water-ethanol-acetone to obtain (2S, 5S) -5-hydroxy-piperidin-2-carboxylic acid. (Compound (10)) 1.61 g (96% purity, yield 28%) was obtained.
[0212]
1 1 H-NMR (400 MHz, CD 3 OD) δ1.73-1.90 (2H, m), 2.0-3-2.10 (2H, m), 3.09 (1H, dd, J = 2. 4,12.8Hz), 3.17-3.23 (1H, m), 3.45 (1H, m), 4.02 (1H, m).
[0213]
[Example 16-1] Preparation of (2S, 5S) 5-Hydroxypiperidine-2-carboxylic acid (Compound (10))
　Crude (2S, 5S) -5- prepared according to Example 13 in a 1000 mL reactor. 2 mol / L in 18 g of an aqueous acetic acid solution containing 11.31 g (66.90 mmol) of acetyl-2-oxa-5-azabicyclo [2.2.2] octane-3-one (A = methyl group in formula (9)). 121 mL of hydrochloric acid was charged, and the mixture was stirred at 90 ° C. for 3 hours and BR> A. 1.2 g of activated carbon was added to this reaction solution, and after stirring at 45 ° C. for 1 hour, the activated carbon was filtered, and the filtrate was concentrated to obtain 20.5 g of a residue. Then, this residue was dissolved in 50 mL of water, 175 mL of Diaion (registered trademark) SAT10L (acetic acid anion type) was added, and the mixture was stirred at room temperature for 30 minutes and filtered, and the filtrate was concentrated to concentrate 16.5 g of the residue. Got Then, 2.1 mL of water and 70 mL of ethanol were added to the residue to crystallize at 60 ° C., the crystals were filtered at room temperature, dried, and (2S, 5S) -5-hydroxy-piperidine-2-carboxylic acid was added. 8.0 g (93% purity, 77% yield) of crude crystals of the acid (compound (10)) was obtained.
[0214]
[Example 16-2] Preparation of (2S, 5S) -5-hydroxypiperidine-2-carboxylate salt (hydrochloride of compound (10))
　Obtained in Example 14-2 in a 10 mL reactor (2S). , 5S) -5-benzoyl-2-oxa-5-azabicyclo [2.2.2] octane-3-one (A = phenyl group in formula (9)) 0.43 g (pure 0.36 g 1.58 mmol) ), 1.5 mL of water and 0.50 g of 35% hydrochloric acid were charged, and the mixture was stirred at 100 ° C. for 15 hours. As a result of quantifying 11.38 g of the filtrate obtained by filtering the precipitated benzoic acid by HPLC, 1.50 mmol (yield 95%) of (2S, 5S) -5-hydroxypiperidine-2-carboxylate salt was contained. board.
The scope of the claims
[Claim 1]
(I) Step 4: The following
　formula (7)
[Chemical

formula 1] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents an alkyl group having 1 to 10 carbon atoms. , an aryl group having 6 to 12 carbon atoms, and a hydroxyl group deprotected in the compound represented by alkyl group having 1 to 4 carbon atoms, or. of an aralkyl group having 7 to 20 carbon atoms),
　formula ( 8)
[Chemical

formula 2] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 to 4 carbon atoms. alkyl group, or process, for synthesizing shown.) and a compound represented by the aralkyloxy group having 7 to 20 carbon atoms
　, characterized in that it comprises the following formula (10)
[formula 3]

represented by ( 2S, 5S) / (2R, 5R) -Method for producing 5-hydroxypiperidin-2-carboxylic acid.
[Claim 2]
　Further, (ii) step 5:
(a) in the compound (8), the ester group is hydrolyzed, one of the carboxyl groups is reacted with the hydroxyl group to form a lactone, and the carboxyl group is decarbonated
　or decarbonated. ,
(B) In the compound (8), the ester group is hydrolyzed and one of the carboxyl groups is decarbonated to obtain a stereoisomer mixture of the 2-position monocarboxylic acid, and then the stereoisomer mixture is isomerized. is lactonized,
by,
　the following equation (9)
[formula 4]

(wherein, a represents an alkyl group, an aryl group having 6 to 12 carbon atoms or an alkyloxy group having 1 to 4 carbon atoms, 1 to 10 carbon atoms ,
　(2S, 5S) / (2R, 5R)-. A method for producing 5-hydroxypiperidin-2-carboxylic acid.
[Claim 3]
Further, (iii) step 6:
　the amide bond in the compound (9) is cleaved and the lactone in the compound (9) is hydrolyzed to (2S, 5S) / (2R, 5R) -5-hydroxypiperidine.
　The (2S, 5S) / (2R, 5R) -5-hydroxypiperidine-2-carboxylic acid according to claim 1 or 2 , which comprises a step of synthesizing -2-carboxylic acid. Production method.
[Claim 4]
　The
　method according to claim 2 or 3, wherein in the step 5 (a) or the step 5 (b), the reaction for decarboxylating the carboxyl group is carried out in the presence of an organic base. A method for producing 2S, 5S) / (2R, 5R) -5-hydroxypiperidin-2-carboxylic acid.
[Claim 5]
　Step 1: The following
　formula (1)
[Chemical

formula 5] (In the formula, X represents Cl, Br, or I, and R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted. The hydroxyl group in the compound represented by) is protected by a protective group, and the following
　formula (2)
[Chemical

formula 6] (in the formula, X represents Cl, Br, or I, and R 1 is a hydrogen atom or substituted. A compound represented by an alkyl group having 1 to 4 carbon atoms and P indicating a protective group may be synthesized, and
　then the ester group in the compound (2) is reduced to
　formulate the following formula (3).
[Chemical

formula 7] (in the formula, X represents Cl, Br, or I, P represents a protective group),
　which comprises the step of synthesizing the compound represented by the following
　formula (7)
[. Chemical

formula 8] (In the formula, P indicates a protective group, R 3 indicates an alkyl group having 1 to 4 carbon atoms, A indicates an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and carbon number of carbon atoms. A
method for producing a compound represented by an alkyloxy group of 1 to 4 or an aralkyloxy group having 7 to 20 carbon atoms .
[Claim 6]
(I) Step 2:
　The hydroxyl group in the compound (3) is sulfonic acid esterified to represent the following
　formula (4)
[Chemical

formula 9] (in the formula, X represents Cl, Br, or I, and R 2 has 6 carbon atoms. A compound represented by an aryl group of ~ 12, an alkyl group having 1 to 10 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms is synthesized, and the
　compound (4) and the following
　formula (5)
[ 10]

(In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyloxy group having 1 to 4 carbon atoms. , Or a compound represented by an aralkyloxy group having 7 to 20 carbon atoms), and the following
　formula (6)
[Chemical

formula 11] (in the formula, X represents Cl, Br, or I, P indicates a protective group, R 3 indicates an alkyl group having 1 to 4 carbon atoms, A indicates an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyloxy group having 1 to 4 carbon atoms. , Or a compound represented by an aralkyloxy group having 7 to 20 carbon atoms.) And
(ii) Step 3: The
　compound (6) is cyclized to form the following
　formula (7).
[Chemical

formula 12] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, A represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and carbon. 　The compound (7) according to claim 5, further comprising
a step of synthesizing a compound represented by an alkyloxy group having the number 1 to 4 or an aralkyloxy group having 7 to 20 carbon atoms.
) Manufacturing method.
[Claim 7]
　The
　method for producing a compound (7) according to claim 6, wherein in the step 2, the reaction between the compound (4) and the compound (5) is carried out in the presence of an iodine salt .
[Claim 8]
　The
　method for producing a compound (7) according to claim 6 or 7, wherein in the step 3, the cyclization reaction of the compound (6) is carried out in the presence of a quaternary ammonium salt .
[Claim 9]

　The (2S) according to any one of claims 1 to 4, 　wherein the compound (7) is produced by the method according to any one of claims 5 to 8. , 5S) / (2R, 5R) -5-Hydroxypiperidine-2-carboxylic acid production method.
[Claim 10]
(I) Step 4: The following
　formula (7)
[Chemical

formula 13] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents an alkyl group having 1 to 10 carbon atoms. , an aryl group having 6 to 12 carbon atoms, and a hydroxyl group deprotected in the compound represented by alkyl group having 1 to 4 carbon atoms, or. of an aralkyl group having 7 to 20 carbon atoms),
　formula ( 8)
[Chemical

formula 14] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 to 4 carbon atoms. A
　method for producing a compound represented by the above formula (8) , which comprises a step of synthesizing a compound represented by an alkyloxy group or an aralkyloxy group having 7 to 20 carbon atoms .
[Claim 11]
(I) Step 4: The following
　formula (7)
[Chemical

formula 15] (In the formula, P represents a protecting group, R 3 represents an alkyl group having 1 to 4 carbon atoms, and A represents an alkyl group having 1 to 10 carbon atoms. , an aryl group having 6 to 12 carbon atoms, and a hydroxyl group deprotected in the compound represented by alkyl group having 1 to 4 carbon atoms, or. of an aralkyl group having 7 to 20 carbon atoms),
　formula ( 8)
[Chemical

formula 16] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and 1 to 4 carbon atoms. A step of synthesizing an alkyloxy group or an aralkyloxy group having 7 to 20 carbon atoms.),
(Ii) Step 5:
(a) In the compound (8), the ester group is hydrolyzed. , One of the carboxyl groups is reacted with a hydroxyl group to form a lactone, and the carboxyl group is further decarbonated,
　or
(b) in the compound (8), the ester group is hydrolyzed to remove one of the carboxyl groups. Carbonation is carried out to form a steric isomer mixture of the 2-position monocarboxylic acid, and then the steric isomer mixture is isomerized and lactonized,
whereby the following
　formula (9)
[Chemical expression 17] is obtained.

(In the formula, A represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkyloxy group having 1 to 4 carbon atoms and an aralkyloxy group having 7 to 20 carbon atoms). A
　method for producing a compound represented by the above formula (9) , which comprises a step of synthesizing the compound to be used.
[Claim 12]
　A compound represented by the following formula (9a).
[Chemical

formula 18] (In the formula, A'indicates an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms.)
[Claim 13]
　A compound represented by the following formula (11a) or (11b) or a salt thereof.
[Chemical

formula 19] (In the formula, A'indicates an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms.)
[Chemical

formula 20] (In the formula , A'represents an alkyl group having 1 to 10 carbon atoms. Indicates a group or an aryl group having 6 to 12 carbon atoms.)
[Claim 14]
　A compound represented by the following formula (8) or a salt of its dicarboxylic acid.
[Chemical

formula 21] (In the formula, R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an alkyloxy having 1 to 4 carbon atoms. Indicates a group or an aralkyloxy group having 7 to 20 carbon atoms.)
[Claim 15]
　A compound represented by the following formula (7).
[Chemical

formula 22] (In the formula, P indicates a protective group, R 3 indicates an alkyl group having 1 to 4 carbon atoms, A indicates an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, and carbon. It indicates an alkyloxy group having a number of 1 to 4 or an aralkyloxy group having a carbon number of 7 to 20.)
[Claim 16]
　A compound represented by the following formula (6a).
[Chemical 23]

(In the formula, X represents Cl, Br, or I, P'shows a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. R 3 represents an alkyl group having 1 to 4 carbon atoms, A is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkyloxy group having 1 to 4 carbon atoms, or 7 to 20 carbon atoms. Indicates the aralkyloxy group of.)
[Claim 17]
　A compound represented by the following formula (4a).
[Chemical

formula 24] (In the formula, X represents Cl, Br, or I, and P'represents a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. R 2 represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms.)
[Claim 18]
　A compound represented by the following formula (3a).
[Chemical

formula 25] (In the formula, X represents Cl, Br, or I, and P'represents a tetrahydropyranyl group, a methoxymethyl group, an ethoxyethyl group, a tert-butyl group, or a tert-butyldimethylsilyl group. )
[Claim 19]
　A compound represented by the following formula (2a).
[Chemical

formula 26] (In the formula, X represents Cl, Br, or I, R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted, and P'' represents a tetrahydropyranyl group. , Or an ethoxyethyl group.)