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:
Feb. 13, 2018
Filed:
Feb. 12, 2014
Applicant:
Cipla Limited, Mumbai, IN;
Inventors:
Rajendra Narayanrao Kankan, Mumbai, IN;
Srinivas Laxminarayan Pathi, Bangalore, IN;
Venugopalarao Chinimilli, Bangalore, IN;
Assignee:
Cipla Limited, Mumbai, IN;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 211/70 (2006.01); C07D 211/82 (2006.01); C07D 213/06 (2006.01); C07D 213/58 (2006.01); C07D 213/42 (2006.01);
U.S. Cl.
CPC ...
C07D 213/58 (2013.01); C07D 213/42 (2013.01);
Abstract
The present invention relates to a process for the preparation of Compound (A): wherein the process comprises contacting atazanavir base (Compound (II)) with sulphuric acid in a combination of two or more solvents and isolating compound (A). The present invention also relates to substantially pure Compound (A), and to Compound (A) devoid of mesityl oxide impurity. Mesityl oxide has the following formula: