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, 2022
Filed:
Apr. 15, 2019
Applicant:
Bayer Aktiengesellschaft, Leverkusen, DE;
Inventors:
Albert Schnatterer, Leverkusen, DE;
Michael Dockner, Cologne, DE;
Peter Bruechner, Krefeld, DE;
Thomas Himmler, Odenthal, DE;
Assignee:
BAYER AKTIENGESELLSCHAFT, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 317/72 (2006.01); C07D 491/113 (2006.01);
U.S. Cl.
CPC ...
C07D 317/72 (2013.01); C07D 491/113 (2013.01);
Abstract
The present invention relates to a novel process for the esterification of N-acylated amino acids which contain an acid-labile keto protective group under alkaline conditions without using a polar aprotic solvent, in which the N-acylated amino acid with acid-labile keto protective group prepared in situ is esterified using an alkyl halide or a mono- or dialkyl ester of sulfuric acid.