Title:
光学活性有機カルボン酸の製造方法
Document Type and Number:
Japanese Patent JP5598330
Kind Code:
B2
Abstract:
The present invention is a simple method, in which a specific amount of alkali is added to an enantiomeric mixture of an optically active organic carboxylic acid where enantiomers are present in a non-equimolar ratio, or in which the enantiomeric mixture of an optically active organic carboxylic acid is neutralized with an alkali, and then a specific amount of acid is added thereto, thereby separating an organic carboxylic acid salt in the mother liquor and a crystallized organic carboxylic acid from each other. The method makes it possible to obtain an optically active organic carboxylic acid with improved enantiomeric excess. The present invention provides a simple production method for obtaining an optically active organic carboxylic acid with improved enantiomeric excess from an enantiomeric mixture of an optically active organic carboxylic acid where enantiomers are present in a non-equimolar ratio.
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Inventors:
久古 Yoichi
Application Number:
JP2010535812A
Publication Date:
October 01, 2014
Filing Date:
October 28, 2009
Export Citation:
Assignee:
Mitsubishi Gas Chemical Co., Inc.
International Classes:
C07C51/43; C07B57/00; C07C51/487; C07C57/30; C07D311/66
Domestic Patent References:
| JPH06507159A | 1994-08-11 | |||
| JPH07149688A | 1995-06-13 | |||
| JP2008044856A | 2008-02-28 | |||
| JP2005023055A | 2005-01-27 | |||
| JPH06507159A | 1994-08-11 | |||
| JPH07149688A | 1995-06-13 | |||
| JP2008044856A | 2008-02-28 | |||
| JP2005023055A | 2005-01-27 |
Foreign References:
| WO2008050829A1 | 2008-05-02 | |||
| WO2002012221A1 | 2002-02-14 | |||
| WO2004108944A1 | 2004-12-16 | |||
| WO2008050829A1 | 2008-05-02 | |||
| WO2002012221A1 | 2002-02-14 | |||
| WO2004108944A1 | 2004-12-16 |