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. 25, 2018
Filed:
Nov. 17, 2015
Applicant:
Merck Patent Gmbh, Darmstadt, DE;
Inventors:
Andreas Waechtler, Darmstadt, DE;
Hadia Saleh-Kassim, Forbach, FR;
Christian Jasper, Seligenstadt, DE;
Joern Kolb, Arheiligen, DE;
David Maillard, Darmstadt, DE;
Assignee:
MERCK PATENT GMBH, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 471/04 (2006.01); C07C 31/30 (2006.01); C07B 55/00 (2006.01); C07B 57/00 (2006.01);
U.S. Cl.
CPC ...
C07D 471/04 (2013.01); C07B 55/00 (2013.01); C07B 57/00 (2013.01); C07C 31/30 (2013.01); C07B 2200/07 (2013.01);
Abstract
The present invention relates to a method for the racemization of enantiomerically pure or enantiomerically enriched Praziquantel under basic conditions and a method for the production of (R)-Praziquantel in enantiopure or enantiomerically enriched form, which comprises the racemization method.