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:
Oct. 24, 2006
Filed:
Dec. 16, 2003
Applicants:
Vijay Kumar Handa, Banjara Hills, IN;
Arun Kumar Gupta, Kukatpally, IN;
Meenakshisunderam Sivakumaran, Somajiguda, IN;
Inventors:
Vijay Kumar Handa, Banjara Hills, IN;
Arun Kumar Gupta, Kukatpally, IN;
Meenakshisunderam Sivakumaran, Somajiguda, IN;
Assignee:
Aurobindo Pharma Limited, Ameerpet Hyderabad, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 263/04 (2006.01); C07C 313/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention is directed to a new process of preparing highly pure Florfenicol. The invention is further directed to new oxazolidine derivatives useful in making Florfenicol and processes of making these derivatives. Examples of such intermediates include (4R,5R)-3-acetyl-2,2-dimethyl-4-hydroxymethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine; and (4S,5R)-3-acetyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine.