METHOD FOR PREPARATION OF IMIDODISULFURYL COMPOUNDS
The invention relates to a method for the preparation of imidodisulfuryl compounds in a
continuous reaction at elevated temperatures.
BACKGROUND OF THE INVENTION
In the following text, if not otherwise stated, the following meanings are used:
CSI chlorosulfonyl isocyanate
CSOS chlorosulfonic acid
C1SI bis(chlorosulfonyl)-imide
FSI fluorosulfonyl isocyanate
FSOS fluorosulfonic acid
FR flow rate
RT room temperature
Imidodisulfuryl compounds are used for a number of purposes. One example is the use of
imidodisulfurylchlorid for the preparation of lithium bis(fluorosulfonyl)imid, which again is
used as an electrolyte e.g. in lithium ionic batteries, which e.g. can be used in automotive
batteries, and is used as antistatic agent in touch screens.
DE 1 159 410 B discloses a method for preparation of halosulfonyl isocyanates by a reaction
of halosulfonic acid with urea. The reaction is done preferably at a temperature of from 100 to
180°C. Specifically disclosed is the preparation of chlorosulfonyl isocyanate at a temperature
of from 120 to 150°C.
DE 1 143 495 B discloses a method for preparation of imido-bis(sulfuryl)fluorid by a reaction
of fluorosulfonic acid with urea. The reaction temperature is not stated apparently the reaction
starts at room temperature and in the course of the reaction the reaction mixture is cooled
from time to time.
CA 710255 A discloses a method for preparation of imido-bis(sulfurylchloride) by a reaction
of chlorosulfonic acid with trichlorophosphazo-sulfuryl chloride. Methods such as disclosed
in CA 710255 have the disadvantage of requiring phosphorus chemistry which is rather
expensive and environmentally disadvantageous to use.
WO 2009/123328 Al discloses the preparation of C1SI in a batch method, details are given in
the example section of instant invention.
The reaction equation of instant invention for preparation of imidodisulfurylhalides, also
named imidobis(sulfurylhalides), imidobissulfurylhalides or bis(halidosulfonyl)imide, which
also is applicable for similar compounds of instant invention, is depicted in Scheme 1;
Scheme 1
with Xa and Xb being halogen.
Both starting compounds, the isocyanate and the sulfonic acid, and the product, the bis imide,
are toxic and corrosive. In case of Xa and Xb being CI, the product shows a very high
exothermic decomposition at elevated temperatures, making it necessary to provide adequate
safety measures in production. The heat of reaction deltaH is ca. 100 kJ/mol, the onset of
decomposition of the imidosulfurylchloride is around 180°C with an adiabatic temperature
rise to temperatures well over 400°C. The reaction of CSI with FSOS and the reaction of FSI
with CSOS show similar temperatures for the onset of decomposition.
Therefore the reaction temperature in batch processes in production is not higher than 150°C
to avoid the risk of explosion. The reaction times of the batch processes ranges from ca. 8 h to
24 h.
On the other hand the isocyanate and the sulfonic acid only react at elevated temperatures.
Due to these circumstance and safety considerations, in the past the imidodisulfurylhalides
have been prepared only in small batches and at temperatures well below the onset of
decomposition as mentioned, leading to the mentioned long reaction times.
There was a need for a method for preparation of imidodisulfurylhalides, which does not need
phosphorous chemistry, has short reaction times and high yields, where the product shows
high purity, and allows for safe handling of the substances and of the reaction, also on a large
scale.
Unexpectedly, it is possible to react a halosulfonyl isocyanate with a halosulfonic acid at
temperatures above the onset temperature of decomposition of the reaction product, the
imidodisulfurylhalide without the expected decomposition of the desired
imidodisulfurylhalide, the yields are high. It was unexpected to be able to conduct the reaction
in a safe way. This allows for the desired short reaction times.
Furthermore the short reaction times can be realized still with a product with high purity, i.e.
not showing discoloration due to decomposition or polymerization reactions usually taking
place at too high temperatures.
SUMMARY OF THE INVENTION
Subject of the invention is a method for preparation of compound of formula (I);
the method comprises three consecutive steps step (StepSl), step (StepS2) and step (StepS3);
step (StepSl) comprises a reaction (ReacRl);
reaction (ReacSl) is a reaction of compound of formula (II) with compound of formula (III);
wherein
XI and X2 are identical or different and independently from each other selected from the
group consisting of F, CI, Br, J, Ci_ perfluoroalkyl, and tolyl;
n+ . _ . . _ + .+ + + 2+ 2+ 2+ 2+
R is selected from the group consisting of H , Li ,Na , K ,Mg , Ca , Zn , Cu ,
, [N(R20)(R21)(R22)R23]+, and [P(R20)(R21)(R22)R23]+;
R20, R21, R22 and R23 are identical or different and independently from each other
selected from the group consisting of H, Ci_ alkyl, C _ cycloalkyl, phenyl, benzyl,
vinyl and allyl;
n is 1, 2 or 3;
the reaction (ReacSl) is done in a continuous way;
in step (StepSl) a mixture of compound of formula (II) and compound of formula (III) passes
through a device (DevSl), device (DevSl) is a continuously working device, in device
(DevSl) the mixture of compound of formula (II) and compound of formula (III) is
heated to a temperature (TempSl), temperature (TempSl) is of from 180 to 300°C, where
the reaction (ReacSl) takes place, resulting in a reaction mixture,
in step (StepS2) the reaction mixture from device (DevSl) passes through a device (DevS2),
device (DevS2) is a device for cooling the reaction mixture;
in step (StepS3) the reaction mixture from device (DevS2) passes through a device (DevS3),
device (DevS3) is a device for back pressure regulation;
the reaction mixture is cooled to a temperature (TempS2) by the effects on the reaction
mixture of device (DevS2) or of device (DevS3) or of a combination of device (DevS2)
and device (DevS3), temperature (TempS2) is of from 0 to 150°C.
DETAILED DESCRIPTION OF THE INVENTION
Preferably, the method comprises furthermore a step (StepS4), which is done after step
(StepS3), in step (StepS4) the reaction mixture from device (DevS3) passes through a
device (DevS4), device (DevS4) is a device for separating C0 2 from the reaction mixture.
Preferably, X I and X2 are identical and are selected from the group consisting of F, CI, Br,
Ci_6 perfluoroalkyl and tolyl;
more preferably, X I and X2 are identical and are selected from the group consisting of F, CI
and Ci_6 perfluoroalkyl;
even more preferably, X I and X2 are identical and are selected from the group consisting of
F, CI and CF3;
especially, X I and X2 are identical and are CI or CF3;
more especially, X I and X2 are CI.
Preferably
, [N(R20)(R21)(R22)R23] +;
R20, R21, R22 and R23 are identical or different and independently from each other
selected from the group consisting of H, Ci_s alkyl, C5-6 cycloalkyl, phenyl, benzyl,
vinyl and allyl;
more preferably,
, [N(R20)(R21)(R22)R23]
R20, R21, R22 and R23 are identical or different and independently from each other
selected from the group consisting of H, Ci_s alkyl, C5-6 cycloalkyl, phenyl and benzyl;
even more preferably,
R is selected from the roup consisting of H
, , [N(R20)(R21)(R22)R23] +;
R20, R21, R22 and R23 are identical or different and independently from each other
selected from the group consisting of H, Ci_s alkyl, C5-6 cycloalkyl, phenyl and benzyl;
especially,
,
, [N(R20)(R21)(R22)R23] +;
R20, R21, R22 and R23 are identical or different and independently from each other
selected from the group consisting of H, Ci_s alkyl, C5-6 cycloalkyl, phenyl and benzyl,
more especially,
,
and
R20 and R21 are identical or different and independently from each other selected from the
group consisting of H and Ci_s alkyl;
even more especially,
R is selected from the group consisting of H , Na and and
R20 and R21 are identical or different and independently from each Ci_8 alkyl;
in particular,
R20 and R21 are identical or different and independently from each Ci_4 alkyl;
ore in particular,
R20 and R21 are identical or different and independently from each selected from the group
consisting of methyl, ethyl and n-butyl.
When Rn is H then compound of formula (III) can also displayed in the conventional way,
that is as compound of formula (Illconv).
(Illconv)
Preferably, the reaction (ReacSl) is done in a tubular reactor. During the passage through
device (DevSl), the initially fed mixture gradually is converted to the reaction mixture by
the reaction.
Preferably, device (DevSl) is selected from the group consisting of tube, microreactor, shell
and tube heat exchanger, plate heat exchanger and any common device which purpose is
to exchange heat from a mixture;
more preferably it is a tube;
even more preferably it is a coiled tube.
Preferably, device (DevS2) is selected from the group consisting of tube, microreactor, shell
and tube heat exchanger, plate heat exchanger and any common device which purpose is
to exchange heat from a reaction mixture;
more preferably it is a tube;
even more preferably it is a coiled tube.
Especially, device (DevSl) and device (DevS2) are coiled tubes.
Preferably, device (DevS3) is a conventional back pressure regulating device.
Preferably, device (DevS4) a device capable of separating gaseous C0 2 from a liquid, any
known device suitable for this purpose for can be used for this purpose, more preferably
device (DevS4) is a column or a cyclone.
The heating in device (DevSl) can be done be any known means, preferably it is done by
electric heating or by heating with a fluid heat carrier.
Cooling in device (DevS2) can be done be any known means, preferably it is done by a fluid
cooling medium.
Depending on the scale of the reaction and thereby on the scale of the apparatus, wherein the
method is done, the cooling of the reaction mixture is done not only by the effect on the
reaction mixture of device (DevS2), i.e. during the passage of the reaction mixture
through device (DevS2), but additionally the effects on the reaction mixture of device
(DevS3), i.e. the passage through device (DevS3) contributes to the cooling. This is
especially the case when the scale of the reaction is rather small, e.g. when the method is
done on lab scale, whereas in case where the method is done on a production scale the
cooling will usually primarily be done during the passage through device (DevS2).
In another embodiment, especially on production scale, cooling can also be achieved by
the expansion and pressure release affected by device (DevS3).
Also a combination of cooling during the passage through device (DevS2) with a cooling
by expansion affected by device (DevS3) is possible.
Preferably, heating in device (DevSl) and cooling in Device (DevS2) is realized in form of a
tube-in-tube set up, in form of a tube-in-container set up, in form of a shell and tube heat
exchanger, plate heat exchanger or any common device which purpose is to exchange
heat from a mixture or a reaction mixture;
more preferably, heating in device (DevSl) and cooling in Device (DevS2) is realized in form
of a tube-in-tube set up or in form of a tube-in-container set up.
Reaction (ReacSl) is triggered in device (DevSl) by the heating of the mixture in the device
(DevSl) to the temperature (TempSl).
Reaction (ReacSl) is quenched in device (DevS2), this is done by the cooling the reaction
mixture in the device (DevS2) to the temperature (TempS2).
Preferably, temperature (TempSl) is of from 190 to 280°C, more preferably of from 200 to
260°C, even more preferably from 210 to 255°C, especially from 220 to 255°C.
Preferably, temperature (TempS2) is from 10 to 120°C, more preferably from 15 to 100°C,
even more preferably from 15 to 90°C, especially from 15 to 85°C, more especially from
20 to 85°C.
The melting point of pure C1SI is ca. 35°C, therefore the lowest possible value of temperature
(TempS2) is governed by the conversion of the reaction, since residual compound of formula
(II) and residual compound of formula (III) in the reaction mixture naturally lowers the
melting point of the reaction mixture after the reaction and allows for lower values of
temperature (TempS2).
Reaction (ReacSl) is done at a pressure (PressSl). Preferably, pressure (PressSl) is from 10
to 1000 bar, more preferably from 20 to 600 bar, even more preferably from 50 to 500
bar, especially from 60 to 400 bar, more especially from 65 to 300 bar, even more from
65 to 200 bar, in particular from 65 to 150 bar.
The pressure (PressSl) in device (DevSl) and device (DevS2) is controlled and held by the
device (DevS3).
Time (TimeSl) is the time, where the mixture is exposed to heating and to the temperature
(TempSl) in device (DevSl). During time (TimeSl) the reaction (ReacSl) takes place.
Time (TimeSl) is therefore a residence time and is preferably the residence time of the
mixture in device (DevSl).
Preferably, time (TimeSl) is from 0.5 sec to 4 h, more preferably from 1 sec to 2 h, even
more preferably 1 min to 1 h, especially from 2 min to 30 min, more especially from
2 min to 20 min, even more especially from 3 min to 17 min.
Time (TimeS2) is the time, where the reaction mixture is cooled to temperature (TempS2).
The cooling can be done by the action of device (DevS2), by the action of device
(DevS3) or by the action of device (DevS2) and device (DevS3). The cooling quenches
the reaction. Time (TimeS2) is therefore a residence time and is preferably the residence
time of the reaction mixture in device (DevS2) and in device (DevS3).
Preferably, time (TimeS2) is from 0.1 sec to 2 h, more preferably from 0.5 sec to 1 h, even
more preferably 1 sec to 30 min, especially from 10 sec to 30 min, more especially from
25 sec to 25 min, even more especially from 1 min to 25 min.
Preferably, Time (TimeS2) is from 0.0001 to 0.5 fold of time, more preferably from 0.001 to
0.3 fold, of time (TimeS 1).
Preferably, the molar amount of compound of formula (III) is from 0.5 to 1.5 fold, more
preferably from 0.75 to 1.25 fold, even more preferably from 0.85 to 1.15 fold, of the
molar amount of compound of formula (II).
Compound of formula (II) and compound of formula (III) can be fed into the device (DevSl)
as a premixed mixture or can be fed into the device (DevSl) separately and are mixed in
device (DevSl).
For the purpose of mixing before or in device (DevSl) any suitable installation for mixing can
be used, which are known in the state of the art, such as a common branch connection,
e.g. a T or Y piece, or a static mixing device.
Preferably the heating to temperature (TempSl) in device (DevSl) is done only after
compound of formula (II) and compound of formula (III) are present as a mixture in
device (DevSl).
The feeding of compound of formula (II) and compound of formula (III), either separately or
in form of a mixture, is done by a device (DevSO).
Device (DevSO) is a pressuring device conventionally used to convey a fluid against pressure,
such as a pump. When compound of formula (II) and compound of formula (III) are fed
separately into device (DevSl), then preferably device (DevSO) has for each compound a
respective device.
Preferably, device (DevSl) and device (DevS2) are during operation in permanent fluid
connection with each other and are both under pressure (PressSl).
Preferably, device (DevSO) is the device that builds up the pressure (PressSl) in device
(DevSl) and in the device (DevS2) against the device (DevS3), which is necessary to
carry out the reaction (ReacSl) at the temperature (TempSl).
More preferably, compound of formula (II) and compound of formula (III) are mixed under
ambient pressure and at ambient temperature and then are fed into device (DevSl).
In case of device (DevSl) and/or device (DevS2) being tubes, especially coiled tubes, due to
constructional limitations or due to density fluctuations and the like hot spots or cold spots
can occur in spite of efforts to avoid them. Therefore any mentioned temperatures are meant
to be average temperatures in view of possible hot or cold spots.
Conventional back pressure regulating devices, which can be used for device (DevS3), work
discontinually, i.e. by opening and closing they release the product stream while holding the
pressure. This leads naturally to variations in the pressure. Therefore the pressure (PressSl) is
meant to be an average pressure.
All parts in contact with the mixture of compound of formula (II) and compound of formula
(III) and with the reaction mixture are made out of respective materials, which are resistant to
the attack of the chemicals under the respective conditions, i.e. stainless steel, hastelloy, such
as hastelloy B or hastelloy C, titanium, tantalium, silicon carbide, silicon nitride etc., they can
also be passivized or lined with material inert to the chemicals, such as PTFE.
Compound of formula (I) can be used from device (DevS4) for any subsequent reaction
without further purification, in case of a further purification, preferably, the liquid phase
obtained from device (DevS4) is further purified by removing any low boiling residues,
preferably this is done by using a film evaporator, more preferably a wiped film evaporator.
EXAMPLES
conv conversion was determined by measuring the content (CONT-CSI) of CSI by
weight-% after reaction in the reaction mixture with IR spectroscopy against a
standard, conv is [100 - content (CONT-CSI)] in %.
FR flow rate
nd not determined
p 1 pressure (Press SI)
t l time (TimeSl)
t2 time (TimeS2)
Tl temperature (TempSl)
T2 temperature (TempS2)
Examples 1 to 14
In the examples an equimolar premix of CSOS and CSI was fed into device (DevSl).
The examples were carried out with
• device (DevSO): piston pump 260D from ISCO Teledyne
• device (DevSl) being a 1/8 inch coiled tube with internal volume VolSl made of
hastelloy C. For the heating a coiled-tube-in-container set up was used. Heating
medium was conventional oil.
· device Dev(S2) being a 1/8 inch tube with ca. 1.5 mL internal volume made of
hastelloy C. Cooling was done by simply contact of the tube with the air of the room
having room temperature.
• device (DevS3): standard back pressure regulator from Swagelok of KPB Series
• device (DevS4): the C0 2 was separated from the reaction mixture in an open glas flask
The obtained C1SI in each example was a colorless to yellow liquid.
The structure was confirmed by IR spectroscopy:
IR (ATR, 24 scans, v in cm-1): 3205 (m), 2758 (w), 2652 (w), 1727 (w), 1416 (s), 1318 (m),
1273 (w), 1206 (m), 1167 (s), 862 (s), 567 (s), 500 (s)
Ex VolSl FR Tl tl T2 t2 pl conv
ml [g/min] [°C] [min] [°C] [min] [bar] [%]
1 5.7 1.70 240 5.6 RT 1.4 77 95.8
2 5.7 1.70 240 5.6 RT 1.4 79 94.4
3 5.7 1.52 230 6.3 RT 1.5 87 92.5
4 5.7 1.52 230 6.3 RT 1.5 77 92.6
5 5.7 1.52 230 6.3 RT 1.5 84 92.4
6 5.14 0.58 200 15.5 RT 1 8 1 65.8
7 5.14 0.87 210 10.3 RT 82 60
8 5.14 0.58 210 15.5 RT 82 79.8
9 5.14 0.87 220 10 RT 1 88 83.3
10 5.14 0.58 220 15 RT 80 90.5
11 5.14 1.74 230 5 RT 1.5 8 1 62.5
12 5.14 4.4 250 2.0 RT 0.5 85 73.6
13 5.14 2.2 250 3.9 RT 1 86 93.5
14 5.14 1.15 250 7.5 RT 1.5 87 97.5
Examples 15 to 17
In the examples CSOS and CSI was fed separately into device (DevSl) and were mixed in
device (DevSl) by a inline static mixing device.
The examples were carried out with
• device (DevSO): piston pump 260D from ISCO Teledyne
• device (DevSl) being a 1/8 inch coiled tube with internal volume VolSl made of
hastelloy C. For the heating a coiled-tube-in-container set up was used. Heating
medium was conventional oil.
• device Dev(S2) being a 1/8 inch tube with ca. 1.5 mL internal volume made of
hastelloy C. Cooling was done by simply contact of the tube with the air of the room
having room temperature.
• device (DevS3): standard back pressure regulator from Swagelok of KPB Series
• device (DevS4): the C0 2 was separated from the reaction mixture in an open glas flask
The obtained C1SI in each example was a colorless to yellow liquid.
The structure was confirmed by IR spectroscopy, the data is given in the description
example 1 to 14.
Examples 18 to 21
In the examples an equimolar premix of CSOS and CSI was fed into device (DevSl).
The examples were carried out with
• device (DevSO): piston pump 260D from ISCO Teledyne
• device (DevSl) being a 1/4 inch coiled tube with ca. 54 ml internal volume made of
hastelloy C. For the heating a coiled-tube-in-container set up was used. Heating
medium was conventional oil.
• device Dev(S2) being a 1/8 inch tube with ca. 15 mL internal volume made of
hastelloy C. Cooling was done by simply contact of the tube with water at different
temperature levels T2
• device (DevS3): standard back pressure regulator from Swagelok of KPB Series
• device (DevS4): the C0 2 was separated from the reaction mixture in an open glas flask
The obtained C1SI in each example was a colorless to yellow liquid.
The structure was confirmed by IR spectroscopy, the data is given in the description of
example 1 to 14.
Ex FR Tl tl T2 t2 pl conv
[g/min] [°C] [min] [°C] [min] [bar] [%]
18 25 240 3.6 20 1 72 87.1
19 16.5 240 5.5 20 1 88 94.5
20 17 230 5.3 80 1 83 91.7
21 14.3 230 6.4 80 1 84 90.6
Comparative example
Due to the onset of decomposition it is not allowed to do a batch reaction at a temperature of
higher than 160°C for comparison with the continuous reaction of instant invention. The risk
of explosion is too high. Therefore only batch reactions at 150°C are allowed due to these
safety restrictions.
An equimolar amount of CSI was added to CSOS at 120°C over 3 h, then the mixture was
heated in 3 h to 150°C and stirred at 150°C for 7 h. Conversion was only 90%.
Therefore total reaction time to reach 90% conversion was 13 h. The color was yellow.
A color which is darker than yellow must be avoided under all circumstances in the batch
process since it is an indication of a substantial amount of decomposition which again is an
indication of an explosure being very close.
WO 2009/123328 A l discloses in Synthesis Example 2 the preparation of C1SI in a batch
method. During 2 h CSI was added to CSOS at 120°C, then the mixture was stirred for 6 h at
150°C. Yield was 65.6%.
Example 22
An equimolar premix of CSOS and CSI was fed into device (DevSl).
The example was carried out with
• device (DevSO): commercially available piston pump
· device (DevSl) being a 1/2 inch coiled tube with ca. 1200 ml internal volume made of
hastelloy C. For the heating jacket heating was used. Heating medium was
conventional oil.
• device Dev(S2) being a 1/4 inch tube with ca. 200 mL internal volume made of
hastelloy C. For the cooling jacket cooling was used. Cooling medium was
conventional oil.
• device (DevS3): commercially available standard back pressure regulator was used.
• device (DevS4): the C0 2 was separated in a standard separating device
The obtained C1SI was a colorless to yellow liquid.
The structure was confirmed by IR spectroscopy, the data is given in the description of
example 1 to 14.
Example 23
An equimolar premix of triflouro methane sulfonic acid and CSI was fed into device (DevSl).
The example was carried out with
• device (DevSO): piston pump 260D from ISCO Teledyne
• device (DevSl) being a 1/8 inch coiled tube with internal volume VolSl made of
hastelloy C. For the heating a jacket heating set up was used, heating medium was
conventional oil.
• device Dev(S2) being a 1/8 inch tube with ca. 1.5 mL internal volume made of
hastelloy C. Cooling was done by simple contact of the tube with the air of the room
having room temperature.
• device (DevS3): standard back pressure regulator from Swagelok of KPB Series
• device (DevS4): the C0 2 was separated from the reaction mixture in an open glas flask
The obtained compound of formula (1) was a colorless to yellow liquid.
(1)
Ex VolSl FR Tl tl T2 t2 i conv
ml [g/min] [°C] [min] [°C] [min] [bar] [%]
23 10 4 230 3.2 RT ca. 1 80.4 90.8
The structure was confirmed by IR and NMR spectroscopy:
IR (ATR, 24 scans, v in cm-1): 3279 (w), 1399 (s), 1357 (s); 1176 (s) 1149 (s), 740 (s), 6 11
(s), 581 (s), 510 (s), 549 (s), 476 (s).
NMR (CD3CN, 400 MHz, 24°C, ref. 1,4 difluorobenzene) d = -78.75 ppm
Furthermore the formation of the desired product by the reaction was confirmed by
comparison of the heat of formation obtained by DSC measurements and high level calculated
data.
DSC was measured dynamically with a heat rate of 0.4°C/min.
Turbomole: Quantum mechanical calculations were done with the program TURBOMOLE
V6.5 (18161), Ahlrichs, M. Baer, M. Haeser, H. Horn, and C. Koelmel, Electronic
structure calculations on workstation computers: the program system TURBOMOLE,
Chem. Phys. Lett. 162: 165 (1989); and
Gaussian: Gaussian 09, Revision D.01, M. J . Frisch, G.W. Trucks, H. B. Schlegel, G. E.
Scuseria, M. A. Robb, J . R. Cheeseman, G. Scalmani, V. Barone, B. Mennucci, G. A.
Petersson, H. Nakatsuji, M. Caricato, X. Li, H. P. Hratchian, A. F. Izmaylov, J . Bloino,
G. Zheng, J . L. Sonnenberg, M. Hada, M. Ehara, K. Toyota, R. Fukuda, J . Hasegawa, M.
Ishida, T. Nakajima, Y. Honda, O. Kitao, H. Nakai, T. Vreven, J . A. Montgomery, Jr., J .
E. Peralta, F. Ogliaro, M. Bearpark, J . J . Heyd, E. Brothers, K.N. Kudin, V.N.
Staroverov, R. Kobayashi, J . Normand, K. Raghavachari, A. Rendell, J . C. Burant, S. S.
Iyengar, J . Tomasi, M. Cossi, N. Rega, J . M. Millam, M. Klene, J . E. Knox, J . B. Cross,
V. Bakken, C. Adamo, J . Jaramillo, R. Gomperts, R. E. Stratmann, O. Yazyev, A. J .
Austin, R. Cammi, C. Pomelli, J .W. Ochterski, R. L. Martin, K. Morokuma, V. G.
Zakrzewski, G. A. Voth, P. Salvador, J . J . Dannenberg, S. Dapprich, A. D. Daniels, O.
Farkas, J . B. Foresman, J . V. Ortiz, J . Cioslowski, and D. J . Fox, Gaussian, Inc.,
Wallingford CT, 2009;
using the method B3LYP 6-3 1G.
Examples 24 and 25
An equimolar premix of flouro sulfonic acid and CSI was fed into device (DevSl).
The examples were carried out with
• device (DevSO): piston pump 260D from ISCO Teledyne
• device (DevSl) being a 1/8 inch coiled tube with internal volume VolSl made of
hastelloy C. For the heating a jacket heating set up was used, heating medium was
conventional oil.
• device Dev(S2) being a 1/8 inch tube with ca. 1.5 mL internal volume made of
hastelloy C. Cooling was done by simple contact of the tube with the air of the room
having room temperature.
• device (DevS3): standard back pressure regulator from Swagelok of KPB Series
• device (DevS4): the C0 2 was separated from the reaction mixture in an open glas flask
The obtained compound of formula (2) was a colorless to yellow liquid.
The structure was confirmed by NMR spectroscopy:
NMR (CD3CN, 400 MHz, 24°C, ref: benzenesulfonyl fluoride) d
Application example
The purity and yield of any of the examples 1 to 22 can be determined indirectly by using the
respective obtained product as substrate in a reaction for the preparation of
bis(fluorosulfonyl)-imide. As example for such determination of yield and purity in the
following is described how the product prepared according to example 22 was used as
substrate for the preparation of bis[di((fluorosulfonyl)imide]zinc salt in analogy to Synthesis
Example 19-1 of WO 2009/123328 Al:
In a 500 ml reaction vessel, 179.3 g valeronitrile and 20.3 g C1SI (0.093 mol, prepared
according to example 22) were charged, followed by stirring. Into the reaction vessel, 10.6 g
(0.10 mol) of anhydrous ZnF2 were added, followed by conducting a reaction at room
temperature (25°C) for 3 hours. The bis[di(fluorosulfonyl)imide]zinc salt was obtained as
solution (yield 66.4%, determined by 1 F-NMR and calculated based on C1SI (of a content of
100%)).
Any of the products prepared according to examples 1 to 22 of instant invention had a similar
purity and was obtained in similar yield.
Example 26
An equimolar premix of l-n-butyl-3-methylimidazolium trifluoromethanesulfonate and CSI
was fed into device (DevSl).
The example was carried out with
• device (DevSO): piston pump 260D from ISCO Teledyne
• device (DevSl) being a 1/8 inch coiled tube with internal volume VolSl made of
hastelloy C. For the heating a jacket heating set up was used, heating medium was
conventional oil.
• device Dev(S2) being a 1/8 inch tube with ca. 1.5 mL internal volume made of
hastelloy C. Cooling was done by simple contact of the tube with the air of the room
having room temperature.
• device (DevS3): standard back pressure regulator from Swagelok of KPB Series
• device (DevS4): the C0 2 was separated from the reaction mixture in an open glas flask
The obtained compound of formula (1) was a yellow liquid
Ex VolSl FR Tl tl T2 t2 i conv
ml [g/min] [°C] [min] [°C] [min] [bar] [%]
26 5 0.51 180 0.8 RT ca. 1 80 87
For the reaction product the following analytical data was measured.
IR (ATR, 24 scans, v in cm-1): 3122 (w), 2966 (w), 1573 (w), 1404 (w), 1353 (w) 1256 (s),
1224(m), 1156 (s), 1029 (s), 836 (m), 746 (m), 636 (s), 622 (s), 584 (s) 574 (s)
NMR (CD3CN, 400 MHz, 24°C, ref. 1,4 difluorobenzene) d = -79.28 ppm
CLAIMS
1. Method for preparation of compound of formula (I);
the method comprises three consecutive steps step (StepSl), step (StepS2) and step (StepS3);
step (StepSl) comprises a reaction (ReacRl);
reaction (ReacSl) is a reaction of compound of formula (II) with compound of formula (III);
wherein
XI and X2 are identical or different and independently from each other selected from the
group consisting of F, CI, Br, J, Ci_ perfluoroalkyl, and tolyl;
n+ . _ . . , + .+ + + 2+ 2+ 2+ 2+
R is selected from the group consisting of H , Li ,Na , K ,Mg , Ca , Zn , Cu ,
Al + , Ti + , Fe2+ , Fe + , B + ,
, [N(R20)(R21)(R22)R23]+, and [P(R20)(R21)(R22)R23]+;
R20, R21, R22 and R23 are identical or different and independently from each other
selected from the group consisting of H, Ci_s alkyl, C5-6 cycloalkyl, phenyl, benzyl,
vinyl and allyl;
n is 1, 2 or 3;
the reaction (ReacSl) is done in a continuous way;
in step (StepSl) a mixture of compound of formula (II) and compound of formula (III) passes
through a device (DevSl), device (DevSl) is a continuously working device, in device
(DevSl) the mixture of compound of formula (II) and compound of formula (III) is
heated to a temperature (TempSl), temperature (TempSl) is of from 180 to 300°C, where
the reaction (ReacSl) takes place, resulting in a reaction mixture,
in step (StepS2) the reaction mixture from device (DevSl) passes through a device (DevS2),
device (DevS2) is a device for cooling the reaction mixture;
in step (StepS3) the reaction mixture from device (DevS2) passes through a device (DevS3),
device (DevS3) is a device for back pressure regulation;
the reaction mixture is cooled to a temperature (TempS2) by the effects on the reaction
mixture of device (DevS2) or of device (DevS3) or of a combination of device (DevS2)
and device (DevS3), temperature (TempS2) is of from 0 to 150°C.
2. Method according to claim 1, wherein
the method comprises furthermore a step (StepS4), which is done after step (StepS3), in step
(StepS4) the reaction mixture from device (DevS3) passes through a device (DevS4),
device (DevS4) is a device for separating C0 2 from the reaction mixture.
3. Method according to claim 1 or 2, wherein
X I and X2 are identical and are selected from the group consisting of F, CI, Br,
Ci_6 perfluoroalkyl and tolyl.
4. Method according
R is selected from
, [N(R20)(R21)(R22)R23] ;
R20, R21, R22 and R23 are identical or different and independently from each other
selected from the group consisting of H, Ci_s alkyl, C5-6 cycloalkyl, phenyl, benzyl,
vinyl and allyl.
5. Method according to one or more of claims 1 to 4, wherein
device (DevSl) is selected from the group consisting of tube, microreactor, shell and tube
heat exchanger, plate heat exchanger and any common device which purpose is to
exchange heat from a reaction mixture.
6. Method according to one or more of claims 1 to 5, wherein
device (DevS2) is selected from the group consisting of tube, microreactor, shell and tube
heat exchanger, plate heat exchanger and any common device which purpose is to
exchange heat from a reaction mixture.
7. Method according to one or more of claims 1 to 6, wherein
device (DevS3) is a conventional back pressure regulating device.
8. Method according to one or more of claims 1 to 7, wherein
temperature (TempSl) is of from 190 to 280°C.
9. Method according to one or more of claims 1 to 8, wherein
temperature (TempS2) is from 10 to 120°C.
10. Method according to one or more of claims 1 to 9, wherein
reaction (ReacSl) is done at a pressure (PressSl), pressure (PressSl) is from 10 to 1000 bar.
11. Method according to one or more of claims 1 to 10, wherein
time (TimeSl) is from 0.5 sec to 4 h; time (TimeSl) is the time, where the mixture is exposed
to heating and to the temperature (TempSl) in device (DevSl).
12. Method according to one or more of claims 1 to 11, wherein
time (TimeS2) is from 0.1 sec to 2 h; time (TimeS2) is the time, where the reaction mixture is
cooled to temperature (TempS2).
13. Method according to one or more of claims 1 to 12, wherein
the molar amount of compound of formula (III) is from 0.5 to 1.5 fold of the molar amount of
compound of formula (II).