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:
Sep. 27, 2011
Filed:
Nov. 17, 2006
Applicants:
Purna Chandra Ray, Secunderabad, IN;
Jagan Mohana Chary Tummanapalli, Secunderabad, IN;
Seeta Ramanjaneyulu Gorantla, Secunderabad, IN;
Inventors:
Purna Chandra Ray, Secunderabad, IN;
Jagan Mohana Chary Tummanapalli, Secunderabad, IN;
Seeta Ramanjaneyulu Gorantla, Secunderabad, IN;
Assignee:
Matrix Laboratories, Ltd., Secunderabad, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07H 19/00 (2006.01); C07H 19/048 (2006.01); C07H 5/04 (2006.01); C07H 5/06 (2006.01); C08B 37/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a method for preparing pure Stavudine having purity more than 99.5% comprises: i) Converting 3',5′-anhydrothymidine to crude Stavudine, ii) Converting crude Stavudine to stable solvates of Stavudine, iii) Desolvation of the solvates to give pure Stavudine. The present invention also disclosed novel solvates of Stavudine and conversion of novel Stavudine solvates to Stavudine.