US Patent Issued to Bayer on Sept. 9 for "Process comprising the use of new iridium catalysts for enantioselective hydrogenation of 4-substituted 1,2-dihydroquinolines" (German, Chinese Inventors)

ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,138, issued on Sept. 9, was assigned to Bayer AG (Leverkusen, Germany).

"Process comprising the use of new iridium catalysts for enantioselective hydrogenation of 4-substituted 1,2-dihydroquinolines" was invented by Christoph Schotes (Duesseldorf, Germany), Matthias Beller (Nienhagen, Germany), Kathrin Junge (Rostock, Germany), Weiping Liu (Shanghai), Jacob Schneekoenig (Leipzig, Germany) and Thomas Leischner (Rostock, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "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,...