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:
Jun. 29, 1993
Filed:
Dec. 23, 1992
Applicant:
Inventors:
Ahmed M Tafesh, Corpus Christi, TX (US);
Sambasivarao Kotha, Corpus Christi, TX (US);
Kenneth G Davenport, Corpus Christi, TX (US);
Assignee:
Hoechst Celanese Corporation, Somerville, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
562466 ; 562490 ; 562496 ; 562469 ; 562492 ;
Abstract
This invention provides a process to prepare optically active .alpha.-aryl propionic acids without the need for resolving a racemic mixture. In one embodiment of the process, an acetophenone is sequentially converted to a 1-alkyne, then to an .alpha.-aryl .beta.-silylated acrolein, and then to an acrylic acid, which is then asymmetrically hydrogenated to an optically active .alpha.-aryl propionic acid.
Tafesh, Ahmed. (1993). Preparation of optically active .alpha.-aryl propionic acids (U.S. Patent No. 5223640). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5223640
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile