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Title:
PROCESS FOR PRODUCTION OF OPTICALLY ACTIVE ORGANIC CARBOXYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2010/050499
Kind Code:
A1
Abstract:
Provided is a simple and easy process for the production of an optically active organic carboxylic acid.  The simple and easy process comprises: either adding a specific amount of an alkali to an optically active enantiomer mixture which consists of enantiomers of an organic carboxylic acid and which has a difference between the molar proportions of the enantiomers, or neutralizing such a mixture with an alkali and adding a specific amount of an acid to the neutralized mixture; and then separating an organic carboxylic acid salt which is present in the mother liquor from an organic carboxylic acid which has been precipitated as a crystalline substance.  The simple and easy process enables the production of an optically active organic carboxylic acid having an enhanced enantiomeric excess.  Thus, the invention provides a simple and easy process for producing an optically active organic carboxylic acid having an enhanced enantiomeric excess from an optically active enantiomer mixture which consists of enantiomers of an organic carboxylic acid and which has a difference between the molar proportions of the enantiomers.

Inventors:
KYUUKO, Youichi (Inc. Niigata Research Laboratory, 182, Shinwari, Tayuhama, Kita-ku, Niigata-sh, Niigata 12, 〒9503112, JP)
Application Number:
JP2009/068484
Publication Date:
May 06, 2010
Filing Date:
October 28, 2009
Export Citation:
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Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC. (5-2 Marunouchi 2-chome, Chiyoda-ku Tokyo, 24, 〒1008324, JP)
三菱瓦斯化学株式会社 (〒24 東京都千代田区丸の内二丁目5番2号 Tokyo, 〒1008324, JP)
International Classes:
C07C51/43; C07B57/00; C07C51/487; C07C53/134; C07D311/66
Domestic Patent References:
WO2008050829A1
WO2002012221A1
WO2004108944A1
WO2004108944A1
Foreign References:
JPH06507159A
JPH07149688A
JP2008044856A
JP2005023055A
JP2005023055A
Other References:
HIROSHI YAMANAKA: 'Kogaku Kasseitai no Preparation' KOGAKU ISEITAI NO BUNRI [KIKAN KAGAKU SOSETSU] vol. 6, 10 June 1999, pages 2 - 14, XP008146717
See also references of EP 2351729A1
HIROSHI YAMANAKA, YASUHISA TASHIRO KIKAN KAGAKU SOSETSU 1989, pages 4 - 5
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (OHTANI PATENT OFFICE, Bridgestone Toranomon Bldg. 6F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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