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:
Aug. 09, 2016
Filed:
Jul. 25, 2013
Applicant:
Council of Scientific & Industrial Research, New Delhi, IN;
Inventors:
Subhash Prataprao Chavan, Maharashtra, IN;
Sumanta Garai, Maharashtra, IN;
Kailash Pralhad Pawar, Maharashtra, IN;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 213/02 (2006.01); C07C 213/00 (2006.01);
U.S. Cl.
CPC ...
C07C 213/02 (2013.01); C07C 213/00 (2013.01); C07C 2101/14 (2013.01); C07C 2101/16 (2013.01);
Abstract
The patent discloses an asymmetric synthesis of (−)-venlafaxine using an organocatalyst via a unified strategy employing organcatalytic Michael addition, regio-selective dehydration and selective epoxide ring opening.