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:
Jun. 02, 2026
Filed:
Sep. 19, 2025
Applicant:
Bayer Aktiengesellschaft, Leverkusen, DE;
Inventors:
Assignee:
BAYER AKTIENGESELLSCHAFT, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 215/08 (2006.01); B01J 31/18 (2006.01); B01J 31/22 (2006.01); B01J 31/24 (2006.01);
U.S. Cl.
CPC ...
C07D 215/08 (2013.01); B01J 31/189 (2013.01); B01J 31/2295 (2013.01); B01J 31/2404 (2013.01); B01J 31/2447 (2013.01); B01J 2231/645 (2013.01); B01J 2531/0205 (2013.01); B01J 2531/827 (2013.01);
Abstract
The invention relates to a process for preparing optically active 4-substituted 1,2,3,4-tetrahydroquinolines comprising enantioselective hydrogenation of the corresponding 4-substituted 1,2-dihydroquinolines in presence of a chiral iridium (P,N)-ligand catalyst.