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:
Aug. 27, 2019
Filed:
Aug. 18, 2016
Applicant:
Bayer Pharma Aktiengesellschaft, Berlin, DE;
Inventors:
Johannes Platzek, Berlin, DE;
Kathrin Gottfried, Wuppertal, DE;
Jens Assmann, Haan, DE;
Giulio Lolli, Köln, DE;
Assignee:
BAYER PHARMA AKTIENGESELLSCHAFT, Berlin, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B 3/02 (2006.01); C25B 3/04 (2006.01); C25B 15/08 (2006.01); C07D 471/04 (2006.01);
U.S. Cl.
CPC ...
C07D 471/04 (2013.01); C25B 3/02 (2013.01); C25B 3/04 (2013.01); C25B 15/08 (2013.01);
Abstract
The present invention relates to a novel process for preparing (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide of the formula (I) and recovering (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide of the formula (I) proceeding from (4R)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide of the formula ent-(I)