I [DESCRIPTION]
[Title of Invention]
5-NORBORNENE-2-SPIRO-A-CYCLOALKANONE-A'-SPIRO-2"-5"-NORBORNENE AND METHOD FOR PRODUCING SAME
5 [Technical Field]
The present invention relates to a
5-norbornene-2-spiro-~1-cyc10a1kanone-~1~-spiro-2I ~- ~-5~
norbornene, and a method for producing the same.
[Background Art]
10 Conventionally, a wholly aromatic polyimide (trade
name "Kapton") has been known as a material necessary for
cutting-edge industries for aerospace and aviation
applications and the like. The wholly aromatic polyimide
is synthesized from a combination of an aromatic
15 tetracarboxylic dianhydride and an aromatic diamine by
utilizinga reaction representedbythe following reaction
formula (I) :
[Chem. 11
[ R e a c t i o n Formula (I)]
Wholly aromatic polyimide Kapton
Tg:QlO'C Brawn film
20 The wholly aromatic polyimide is known to exhibit one of
the highest levels of heat resistance (glass transition

[CLAIMS]
[Claim 1]
A
5-norbornene-2-spiro-a-cycloalkanone-a'-spiro-2''-5''-
5 norbornene represented by the following general formula
(1) :
[Chem. 1]
o
[in the formula (1), R'^s, R^, and R^ each independently
10 represent one selected from the group consisting of a
hydrogen atom, alkyl groups having 1 to 10 carbon atoms,
and a fluorine atom, and n represents an integer of 0 to
12] .
[Claim 2]
15 A method for producing a
5-norbornene-2-spiro-a-cycloalk;anone-a' -spiro-2' ' -5' ' -
norbornene, comprising:
a first step of forming a Mannich base by reacting
a carbonyl compound and an amine compound with each other
20 in an acidic solvent, to thereby obtain a reaction liquid
comprising the Mannich base in the acidic solvent,
the acidic solvent comprising a formaldehyde
derivative and 0.01 mol/L or more of an acid represented
65