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Title:
PROCESS FOR PRODUCTION OF OPTICALLY ACTIVE CARBOXYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2003/074464
Kind Code:
A1
Abstract:
The invention provides a process for production of optically active 2,2-dimethylcyclopropanecarboxylic acid by reacting an optical isomer mixture of 2,2-dimethylcyclo- propanecarboxylic acid with an optically inactive amine to form (precipitate or crystallize) an ammonium salt of optically active 2,2-dimethylcyclopropanecarboxylic acid, e.g., optically active (S)-(+)-2,2-dimethylcyclopropanecarboxylic acid. According to the invention, the production (including optical resolution, separation of optical isomers, and purification of optical isomers) of optically active 2,2-dimethylcyclopropanecarboxylic acid important as an intermediate in the production of agricultural chemicals and drugs can be easily carried out at a low cost. Further, the invention provides intermediates for the above production (e.g., ammonium salts of optically active 2,2-dimethylcyclopropanecarboxylic acid, particularly, ammonium salts of optically active (S)-(+)-2,2-dimethyl- cyclopropanecarboxylic acid) and reagents for optical resolution for the separation of optically active 2,2- dimethylcyclopropanecarboxylic acid (e.g., optically inactive amines).

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Inventors:
YATAGAI MASANOBU (JP)
MINOMURA MASAFUMI (JP)
TSUCHIYA SHIGEKATSU (JP)
Application Number:
PCT/JP2003/002455
Publication Date:
September 12, 2003
Filing Date:
March 04, 2003
Export Citation:
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Assignee:
AJINOMOTO KK (JP)
YATAGAI MASANOBU (JP)
MINOMURA MASAFUMI (JP)
TSUCHIYA SHIGEKATSU (JP)
International Classes:
C07C51/41; C07C51/43; C07C51/487; (IPC1-7): C07C61/04; C07C51/487; C07C211/62; C07B57/00
Domestic Patent References:
WO2002022543A12002-03-21
Foreign References:
US5166417A1992-11-24
Other References:
See also references of EP 1489066A4
Attorney, Agent or Firm:
Ishida, Yasumasa (Bohsei Bldg. 7th Floor, 20-12, Shin-Yokohama 3-chome, Kohoku-k, Yokohama-shi Kanagawa, JP)
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