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. 12, 2005
Filed:
Jul. 15, 2002
Applicants:
Gilles Anne-archard, Toulouse, FR;
Patrick Gros-claude, Berberaud, FR;
Inventors:
Gilles Anne-Archard, Toulouse, FR;
Patrick Gros-Claude, Berberaud, FR;
Assignee:
Sanofi-Synthelabo, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D211/58 ;
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for preparing a 4-alkoxycarbonylamino-1-benzyl-4-phenylpiperidine of formula (I)via hydrolysis of 1-benzyl-4-cyano-4-phenylpiperidine (II) in acidic medium and treatment of the 1-benzyl-4-phenyl-4-piperidinecarboxamide (III) thus obtained with bromine in the presence of an alkali metal alkoxide. The invention also relates to a process for preparing 4-methylamino-4-phenylpiperidine from compound (II).