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:
Jul. 04, 1995
Filed:
Jul. 11, 1994
Applicant:
Inventors:
Assignee:
Takasago International Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558441 ; 558342 ;
Abstract
T-butyl (R)-(-)-4-cyano-3-hydroxybutyrate having an optical purity of 99%ee or higher and a process for producing the same are disclosed, the process comprising cyanogenation of a t-butyl (S)-(-)-4-halogeno-3-hydroxybutyrate obtained by enantioselective hydrogenation of a t-butyl 4-halogenoacetoacetate. Recrystallization of the resulting crude product gives the optically active compound with high optical purity.
Mitsuhashi, Shigeru. (1995). T-butyl (r)-(-)-4-cyano-3-hydroxybutyrate and process for preparing the (U.S. Patent No. 5430171). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5430171
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile