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:
Nov. 19, 1991
Filed:
May. 08, 1990
Applicant:
Inventors:
Noboru Sayo, Kanagawa, JP;
Hidenori Kumobayashi, Kanagawa, JP;
Susumo Akutagawa, Kanagawa, JP;
Ryoji Noyori, Aichi, JP;
Hidemasa Takaya, Aichi, JP;
Assignee:
Takasago International Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549319 ; 549325 ; 502213 ; 560 60 ; 562470 ; 562579 ; 564503 ; 568561 ; 568668 ; 568678 ; 568807 ; 568811 ; 568812 ; 568833 ; 568838 ;
Abstract
A process for preparing an optically active alcohol is disclosed, which comprises asymmetrically hydrogenating a carbonyl compound in the presence of a ruthenium-optically active phosphine complex as a catalyst. The resulting alcohol has high optical purity.