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:
Feb. 21, 2012
Filed:
Nov. 12, 2009
Applicants:
Antony Bigot, Paris, FR;
Maxime Lampilas, Paris, FR;
Inventors:
Antony Bigot, Paris, FR;
Maxime Lampilas, Paris, FR;
Assignee:
sanofi-aventis, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 263/04 (2006.01); C07C 271/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
This disclosure relates to methods for preparing an enantiomerically enriched N-carboxyanhydride of an amino alpha acid of the formula (IIIa) or (IIIb): from a compound of the formula (IIa) or (IIb), respectively: wherein R1, R2, and R3 are as defined in the disclosure.