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:
Jul. 09, 2002
Filed:
Jan. 20, 2000
Applicant:
Inventors:
Luigi Forte, Brindisi, IT;
Calogero Cancellieri, Brindisi, IT;
Assignee:
Aventis Bulk S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J 7/100 ;
U.S. Cl.
CPC ...
C07J 7/100 ;
Abstract
A process for preparing the compound (11&bgr;,16&bgr;)-21-(3-CARBOXY-1-OXOPROPOXY)-11-HYDROXY-2′-METHYL-5′H-PREGNA-1,4-DIENO(17,16-D) OXAZOLE-3,20-DIONE which comprises reacting the compound (11&bgr;,16&bgr;)-11,21-DIHYDROXY-2′-METHYL-5′H-PREGNA-1, 4-DIENO(17,16-D)OXAZOLE-3,20-DIONE with succinic anhydride in a (C -C ) alkyl ester of a (C ) carboxylic acid as solvent, in the presence of a basic catalyst.