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:
Sep. 19, 2000
Filed:
Sep. 17, 1999
Applicant:
Inventors:
Osamu Fujimura, Ube, JP;
Kikuo Ataka, Ube, JP;
Assignee:
Ube Industries, Ltd., Yamagushi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ;
U.S. Cl.
CPC ...
556437 ;
Abstract
In a process for preparing an optically active .beta.-hydroxyester derivative by enantioselective aldol addition reaction between an aldehyde and a ketene silylacetal, the enantioselective aldol addition reaction is performed in the presence of an organic base and a platinum-containing catalyst composed of an optically active bisphosphine-platinum complex having two P--Pt bondings which are equivalent to each other, showing in its .sup.31 P NMR spectrum a single peak assigned to P--Pt bonding.