The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2000
Filed:
Nov. 17, 1997
Applicant:
Inventors:
Assignee:
Kuraray Co., Ltd., Kurashiki, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07B / ; C07D / ;
U.S. Cl.
CPC ...
562401 ; 549313 ;
Abstract
An optical resolution method of (.+-.)-3,4-dihydroxybutanoic acid, by reacting (.+-.)-3,4-dihydroxybutanoic acid with an optically active primary amine or secondary amine. Also a method for producing optically active 3-hydroxy-.gamma.-butyrolactone, by reacting (.+-.)-3,4-dihydroxybutanoic acid with an optically active primary amine or secondary amine for optical resolution, and ring closing the resulting optically active 3,4-dihydroxybutanoic acid.