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. 18, 2005
Filed:
Apr. 14, 2004
Applicants:
Eric Didier, Paris, FR;
Guy Amouret, Fresnes, FR;
Inventors:
Eric Didier, Paris, FR;
Guy Amouret, Fresnes, FR;
Assignee:
Aventis Pharma S.A., Antony, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D305/00 ;
U.S. Cl.
CPC ...
Abstract
There is disclosed a process for the preparation of 4-acetoxy-2α-benzoyloxy-5β,20-epoxy-1,13α-dihydroxy-9-oxo-19-norcyclopropa[g] tax-11-ene from 4-acetoxy-2α-benzoyloxy-5β,20-epoxy-1,13α-dihydroxy-9-oxo-7β-(trifluoromethyl sulfonyloxy) tax-11-ene by reaction with a molecular sieve in sulfolane.