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:
May. 21, 2002
Filed:
Jan. 10, 2000
Applicant:
Inventors:
Gerard Andrew Potter, Leicester, GB;
Peter David Tiffin, Cambridge, GB;
Assignee:
Janssen Pharmaceutica, N.V., , BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; A61K 3/155 ;
U.S. Cl.
CPC ...
C07D / ; A61K 3/155 ;
Abstract
A process for the preparation of substantially single enantiomer (−)-narwedine comprises seeding a solution of racemic narwedine dissolved in a solvent with substantially single enantiomer (−)-narwedine, provided that if an added amine base is present the ratic solvent:added amine base is greater than 15:1.