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:
Feb. 05, 1985
Filed:
Jun. 25, 1982
Applicant:
Inventors:
Mamoru Nakai, Ube, JP;
Tokio Ohshima, Ube, JP;
Tomio Kimura, Ube, JP;
Tetsuo Omata, Ube, JP;
Noritada Iwamoto, Ube, JP;
Assignee:
Ube Industries, Ltd., Yamaguchi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548496 ;
Abstract
Biochemical optical resolution of DL-tryptophans in which DL-tryptophan amides are interacted with the culture products, or their treated products, of a microorganism capable of producing amidase is described. L-Tryptophan amides in racemic DL-tryptophan amides are asymmetrically hydrolyzed to form optically active L-tryptophans at a high yield and almost all D-tryptophan amides remain without being subjected to hydrolysis. The resultant D-tryptophan amides are readily hydrolyzed, after separating L-tryptophans, to form optically active D-tryptophans at a high yield.