PROCESSES FOR THE RECOVERY OF OPTICALLY ACTIVE DIACYLTARTATIC ACIDS

Title:

PROCESSES FOR THE RECOVERY OF OPTICALLY ACTIVE DIACYLTARTATIC ACIDS

Document Type and Number:

WIPO Patent Application WO/2004/063141

Kind Code:

A1

Abstract:

A process of subjecting either a salt of an amine with an optically active diacyltartaric acid or a diastereomeric salt of an optically active amine with an optically active diacyltartaric acid which is obtained by optical resolution of a racemic amine by use of an optically active diacyltartaric acid to salt exchange with an aqueous acid solution, wherein an optically active diacyltartaric acid is preliminarily added to the aqueous acid solution. A process which comprises subjecting a raw material containing a racemic amine and an optically active diacyltartaric acid to optical resolution to recover one of the diastereomeric salts of optical isomers of the amine with the optically active diacyltartaric acid, treating the recovered diastereomeric salt with an aqueous acid solution to which an optically active diacyltartaric acid has been preliminarily added to recover a free optically active diacyltartaric acid, and recycling the free optically active diacyltartaric acid to the optical resolution step as the raw material.

Inventors:

MORII SEIJI (JP)
FUJINO TOSHIHIRO (JP)
SATO HARUYO (JP)

Application Number:

PCT/JP2003/016474

Publication Date:

July 29, 2004

Filing Date:

December 22, 2003

Export Citation:

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Assignee:

TORAY FINECHEMICALS CO LTD (JP)
MORII SEIJI (JP)
FUJINO TOSHIHIRO (JP)
SATO HARUYO (JP)

International Classes:

C07C67/52; (IPC1-7): C07C67/52; C07C69/76; C07C69/78; C07C69/92; C07B57/00

Domestic Patent References:

WO2000017153A1

2000-03-30

Foreign References:

JPH0372446A	1991-03-27
JPH03223236A	1991-10-02

Other References: