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:
Nov. 03, 2015
Filed:
Jul. 25, 2014
Kanto Kagaku Kabushiki Kaisha, Chuo-ku, Tokyo, JP;
National University Corporation Hokkaido University, Sapporo-shi, Hokkaido, JP;
Takeaki Katayama, Soka, JP;
Kunihiko Tsutsumi, Soka, JP;
Kunihiko Murata, Soka, JP;
Takeshi Ohkuma, Sapporo, JP;
Noriyoshi Arai, Sapporo, JP;
KANTO KAGAKU KABUSHIKI KAISHA, Tokyo, JP;
NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, Sapporo-Shi, JP;
Abstract
Methods are provided for producing an optically active secondary alcohol at a high optical purity by hydrogenating a substrate carbonyl compound at a high efficiency using as a catalyst a ruthenium complex bearing as a ligand certain optically active diphosphine compound and a readily synthesized amine compound. For example, aromatic ketones and heteroaromatic ketones are reacted with hydrogen and/or a hydrogen donating compound in the presence of the ruthenium complex.