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:
Apr. 10, 2018
Filed:
Dec. 21, 2015
Applicant:
Sandoz Ag, Basel, CH;
Inventors:
Parven Kumar Luthra, Navi Mumbai, IN;
Sachin Bhuta, Navi Mumbai, IN;
Chandrakant Abhinay, Navi Mumbai, IN;
N. Chaven Dattatraya, Navi Mumbai, IN;
D. Metkar Shashikant, Navi Mumbai, IN;
Assignee:
Sandoz AG, , CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 209/08 (2006.01); C07D 209/12 (2006.01);
U.S. Cl.
CPC ...
C07D 209/08 (2013.01); C07D 209/12 (2013.01); Y02P 20/55 (2015.11);
Abstract
The present invention relates to a process for preparing silodosin with high optical purity up to 99.9% enantiomeric excess (e.e.) or above. The process makes use of a method step, in which the enantiomers contained in a racemic mixture of a compound represented by the general formula V: wherein * denotes the asymmetric center, Ris a protecting group, and Ris cyano or carbamoyl, are separated.