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:
Apr. 08, 2014
Filed:
Sep. 20, 2006
Mitsuhisa Yamano, Osaka, JP;
Mitsutaka Goto, Osaka, JP;
Shinji Kawaguchi, Osaka, JP;
Masatoshi Yamada, Osaka, JP;
Jun-ichi Kawakami, Osaka, JP;
Mitsuhisa Yamano, Osaka, JP;
Mitsutaka Goto, Osaka, JP;
Shinji Kawaguchi, Osaka, JP;
Masatoshi Yamada, Osaka, JP;
Jun-ichi Kawakami, Osaka, JP;
Takeda Pharmaceutical Company Limited, Osaka, JP;
Abstract
The present invention provides a novel ligand represented by the following formula and a novel transition metal complex having the ligand, which shows superior enantioselectivity and catalytic efficiency, particularly high catalyst activity, in various asymmetric synthesis reactions. A transition metal complex having, as a ligand, a compound represented by the formula wherein Ris a hydrogen atom or a Calkyl group optionally having substituent(s), and Rand Rare each a Calkyl group optionally having substituent(s), or the formula is a group represented by the formula wherein ring B is a 3- to 8-membered ring optionally having substituent(s).