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:
Sep. 09, 2025
Filed:
Sep. 22, 2020
Applicant:
Bayer Aktiengesellschaft, Leverkusen, DE;
Inventors:
Christoph Schotes, Duesseldorf, DE;
Matthias Beller, Nienhagen, DE;
Kathrin Junge, Rostock, DE;
Weiping Liu, Shanghai, CN;
Jacob Schneekoenig, Leipzig, DE;
Thomas Leischner, Rostock, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 215/08 (2006.01);
U.S. Cl.
CPC ...
C07D 215/08 (2013.01);
Abstract
New iridium catalysts for enantioselective hydrogenation of 4-substituted 1,2-dihydroquinolines The invention relates to a process for preparing optically active 4-substituted 1,2,3,4-tetra hydroquinolines (la, lb) comprising enantioselective hydrogenation of the corresponding 4-substituted 1,2-dihydroquinolines in presence of a chiral iridium (P,N)-ligand catalyst.