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:
Dec. 27, 2016
Filed:
Oct. 29, 2014
Applicant:
Council of Scientific and Industrial Research, New Delhi, IN;
Inventors:
Subhash Prataprao Chavan, Pune, IN;
Kailash Pralhad Pawar, Pune, IN;
Assignee:
Council of Scientific and Industrial Research, New Delhi, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 213/08 (2006.01); C07C 67/42 (2006.01); C07C 29/147 (2006.01);
U.S. Cl.
CPC ...
C07C 213/08 (2013.01); C07C 29/147 (2013.01); C07C 67/42 (2013.01); C07C 2101/14 (2013.01);
Abstract
There is a need for short, resolution free asymmetric process for synthesis of one isomer of venlafaxine, (−)-venlafaxine. The invention provides a novel, short process of synthesis of (−)-venlafaxine, with yield greater than 50% and ee>99%. This process can be used for racemic synthesis of venlafaxine with overall yield 65%.