NORBORNANE-2-SPIRO-alpha-CYCLOALKANONE-alpha'-SPIRO-2''-NORBORNANE-5,5'',6,6''-TETRACARBOXYLIC DIANHYDRIDE, NORBORNANE-2-SPIRO-alpha-CYCLOALKANONE-alpha'-SPIRO-2''-NORBORNANE-5,5'',6,6''-TETRACARBOXYLIC ACID AND ESTER THEREOF, METHOD FOR PRODUCING NORBORNANE-2-SPIRO-alpha-CYCLOALKANONE-alpha'-SPIRO-2''-NORBORNANE-5,5'',6,6''-TETRACARBOXYLIC DIANHYDRIDE, POLYIMIDE OBTAINED BY USING THE SAME, AND METHOD FOR PRODUCING POLYIMIDE

1 . A norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride represented by the following general formula (1):

wherein in the formula (1), R 1 s, R 2 , and R 3 each independently 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.

2 . A norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic acid and an ester thereof represented by the following general formula (2):

wherein in the formula (2), R 2 , R 3 , and R 4 s each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R 5 , R 6 , R 7 , and R 8 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, cycloalkyl groups having 3 to 10 carbon atoms, alkenyl groups having 2 to 10 carbon atoms, aryl groups having 6 to 20 carbon atoms, and aralkyl groups having 7 to 20 carbon atoms, and n represents an integer of 0 to 12.

3 . A method for producing a norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride, comprising:

a step of reacting a 5-norbornene-2-spiro-α-cycloalkanone-α′-spiro-2″-5″-norbornene with an alcohol and carbon monoxide in the presence of a palladium catalyst and an oxidizing agent, to thereby obtain at least one compound of norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic acids and esters thereof, wherein

the 5-norbornene-2-spiro-α-cycloalkanone-α′-spiro-2″-5″-norbornene is represented by the following general formula (3):

wherein in the formula (3), R 2 , R 3 , and R 9 s each independently 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,

the norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic acids and esters thereof is represented by the following general formula (2):

wherein in the formula (2), R 2 , R 3 , and R 4 s each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R 5 , R 6 , R 7 , and R 8 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, cycloalkyl groups having 3 to 10 carbon atoms, alkenyl groups having 2 to 10 carbon atoms, aryl groups having 6 to 20 carbon atoms, and aralkyl groups having 7 to 20 carbon atoms, and n represents an integer of 0 to 12; and

a step of obtaining a norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride from the compound by using formic acid, an acid catalyst, and acetic anhydride, wherein

the norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride is represented by the following general formula (1):

wherein in the formula (1), R 1 s, R 2 , and R 3 each independently 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.

4 . A polyimide having a repeating unit represented by the following general formula (4):

wherein in the formula (4), R 1 s, R 2 , and R 3 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R 10 represents an aryl group having 6 to 40 carbon atoms, and n represents an integer of 0 to 12.

5 . The polyimide according to claim 4 , wherein R 10 in the general formula (4) is at least one of groups represented by the following general formulae (5) to (8):

wherein in the formula (7), R 11 s represent one selected from the group consisting of a hydrogen atom, a fluorine atom, a methyl group, an ethyl group, and a trifluoromethyl group, and in the formula (8), Q represents one selected from the group consisting of groups represented by the formulae: —O—, —S—, —CO—, —CONH—, —SO 2 —, —C(CF 3 ) 2 —, —C(CH 3 ) 2 —, —CH 2 —, —O—C 6 H 4 —C(CH 3 ) 2 —C 6 H 4 —O—, —O—C 6 H 4 —SO 2 —C 6 H 4 —O—, —C(CH 3 ) 2 —C 6 H 4 —C(CH 3 ) 2 —, —O—C 6 H 4 —C 6 H 4 —O—, and —O—C 6 H 4 —O—.

6 . A polyamic acid having a repeating unit represented by the following general formula (9):

wherein in the formula (9), R 1 s, R 2 , and R 3 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R 10 represents an aryl group having 6 to 40 carbon atoms, and n represents an integer of 0 to 12.

7 . The polyamic acid according to claim 6 , wherein R 10 in the general formula (9) is at least one of groups represented by the following general formulae (5) to (8):

wherein in the formula (7), R 11 s represent one selected from the group consisting of a hydrogen atom, a fluorine atom, a methyl group, an ethyl group, and a trifluoromethyl group, and in the formula (8), Q represents one selected from the group consisting of groups represented by the formulae: —O—, —S—, —CO—, —CONH—, —SO 2 —, —C(CF 3 ) 2 —, —C(CH 3 ) 2 —, —CH 2 —, —O—C 6 H 4 —C(CH 3 ) 2 —C 6 H 4 —O—, —O—C 6 H 4 —SO 2 —C 6 H 4 —O—, —C(CH 3 ) 2 —C 6 H 4 —C(CH 3 ) 2 —, —O—C 6 H 4 —C 6 H 4 —O—, and —O—C 6 H 4 —O—.

8 . The polyamic acid according to claim 6 , wherein the polyamic acid has an intrinsic viscosity [η] of 0.05 to 3.0 dL/g, the intrinsic viscosity [η] being measured with a kinematic viscometer under a temperature condition of 30° C. by using a solution of the polyamic acid at a concentration of 0.5 g/dL obtained by dissolving the polyamic acid in N,N-dimethylacetamide.

9 . A method for producing a polyimide, comprising:

a step of reacting a norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride with an aromatic diamine in the presence of an organic solvent, to thereby obtain a polyamic acid,

the norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride being represented by the following general formula (1):

wherein in the formula (1), R 1 s, R 2 , and R 3 each independently 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,

the aromatic diamine is represented by the following general formula (10):

H 2 N—R 10 —NH 2   (10)

[in the formula (10), R 10 represents an aryl group having 6 to 40 carbon atoms,

the polyamic acid having a repeating unit is represented by the following general formula (9):

wherein in the formula (9), R 1 s, R 2 , and R 3 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R 10 represents an aryl group having 6 to 40 carbon atoms, and n represents an integer of 0 to 12; and

a step of subjecting the polyamic acid to imidization, to thereby obtain a polyimide having a repeating unit represented by the following general formula (4):

wherein in the formula, R 1 s, R 2 , and R 3 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R 10 represents an aryl group having 6 to 40 carbon atoms, and n represents an integer of 0 to 12.