Title:
rac-trans-DICYCLOHEXYL-3,3',4,4'-TETRACARBOXYLIC ACID, ITS DIANHYDRIDE AND THEIR PRODUCTION METHOD
Document Type and Number:
Japanese Patent JP2002322120
Kind Code:
A
Abstract:
To provide a racemate of (1S, 1'S, 3S, 3'S, 4S, 4'S)dicyclohexyl-3,3',4,4'- tetracarboxylic acid dianhydride (trans-DCDA-2) and (1R, 1'R, 3R, 3'R, 4R, 4'R)-dicyclohexyl-3,3',4,4'-tetracarboxylic acid dianhydride (trans-DCDA-3) which is useful as a raw material of polyimide resin or the like and its precursor, a racemate of corresponding tetracarboxylic acids (trans-DCTA-2 and trans- DCTA-3) as well as their production method.
A racemate of methyl esters of trans-DCTA-2 and trans-DCTA-3 is hydrolyzed to obtain the racemate of trans-DCTA-2 and trans-DCTA-3. The obtained racemate is dehydrated to obtain the racemate of trans-DCDA-2 and trans-DCDA-3.
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Inventors:
SHIOTANI AKINORI
SHIMAZAKI HIROSHI
SHIMAZAKI HIROSHI
Application Number:
JP2001126993A
Publication Date:
November 08, 2002
Filing Date:
April 25, 2001
Export Citation:
Assignee:
UBE INDUSTRIES
International Classes:
C07C51/09; C07C61/28; C07D307/77; (IPC1-7): C07C61/28; C07C51/09; C07D307/77
Domestic Patent References:
| JPH01161021A | 1989-06-23 | |||
| JPH08104750A | 1996-04-23 | |||
| JPH07215912A | 1995-08-15 | |||
| JPH07304868A | 1995-11-21 | |||
| JPH1171316A | 1999-03-16 | |||
| JPH11130723A | 1999-05-18 | |||
| JPH08325201A | 1996-12-10 |
Other References:
SHIOTANI, AKINORI: "Preparation and structural characterization of cis- and trans-tetramethyl dicyclohexyl-3,3',4,4'-tet", ZEITSCHRIFT FUER NATURFORSCHUNG, B: CHEMICAL SCIENCES, vol. 56, no. 2, JPN6010011749, 2001, pages 189 - 201, ISSN: 0001555240