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:
Nov. 04, 2014
Filed:
Sep. 05, 2011
Surinder Kumar Arora, Pune, IN;
Samir Shanteshwar Shabade, Pune, IN;
Gaurav Kumar, Pune, IN;
Purna Chandra Ray, Pune, IN;
Girij Pal Singh, Pune, IN;
Surinder Kumar Arora, Pune, IN;
Samir Shanteshwar Shabade, Pune, IN;
Gaurav Kumar, Pune, IN;
Purna Chandra Ray, Pune, IN;
Girij Pal Singh, Pune, IN;
Lupin Limited, , IN;
Abstract
The present invention relates to fosamprenavir calcium (Ia) substantially free of isomer impurity, (3R)tetrahydro-3-furanyl(1S,2R)-3-[[(4-aminophenyl)sulfonyl](isobutyl)amino]-1-benzyl-2-(phosphonooxy)propyl carbamate (Ib), and its process for preparation thereof. The present invention also provides fosamprenavir calcium intermediate, (S)-3-tetrahydrofuranyl-N-succinimidyl carbonate (IIa) substantially free of (R)-3-tetrahydrofuranylsuccinimidyl carbonate (IIb) and its process for preparation thereof.