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:
Nov. 04, 2014
Filed:
Feb. 11, 2013
Applicant:
Sanofi, Paris, FR;
Inventors:
Claus-Dieter Graf, Frankfurt am Main, DE;
Joerg Rieke-Zapp, Frankfurt am Main, DE;
Assignee:
Sanofi, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 239/42 (2006.01); C07D 213/74 (2006.01);
U.S. Cl.
CPC ...
C07D 239/42 (2013.01); C07D 213/74 (2013.01);
Abstract
The disclosure relates to a process for the preparation of the enantiomeric forms of 2,3-diaminopropionic acid derivatives of formula I, wherein R1, R2 and R3 are defined as in the disclosure, by racemate resolution. The separation of the racemate into its enantiomers takes place through formation of diastereomeric salts upon addition of an enantiomerically pure auxiliary, and subsequent separation by fractional crystallization.