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:
Dec. 10, 1991
Filed:
Sep. 12, 1989
Applicant:
Inventors:
Jean-Daniel Andre, des Combes, FR;
Jean-Robert Dormoy, nue du Thor, FR;
Alain Heymes, Frederic Mistral, FR;
Assignee:
Sanofi, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546 45 ; 546 44 ;
Abstract
The invention relates to a process for the preparation of morphinane derivatives of general formula: ##STR1## by demethylation of 3-methoxylated compound with a sulfonic acid selected from methanesulfonic acid and trifluoromethanesulfonic acid in the presence of a sulfide.