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. 20, 2011
Filed:
Jul. 20, 2009
Applicants:
BO Chen, Qianjiang, CN;
Zhi-xian Wang, Tianjin, CN;
Yutao Xue, Jinan, CN;
Lihong Liu, Tangshan, CN;
Hao Chen, Tian Jin, CN;
Inventors:
Bo Chen, Qianjiang, CN;
Zhi-Xian Wang, Tianjin, CN;
Yutao Xue, Jinan, CN;
Lihong Liu, Tangshan, CN;
Hao Chen, Tian Jin, CN;
Assignee:
Apotex Pharmachem Inc., Brantford, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 265/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a process for the preparation of Efavirenz. A compound of Formula 1: may be prepared by a process comprising cyclizing, in the presence of a first base, a compound of Formula 5 with a haloformate of Formula 6. Other processes are also provided as well as novel compounds prepared by and used in such processes.