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:
Jul. 06, 2021
Filed:
Sep. 28, 2018
Nippon Chemical Industrial Co., Ltd., Tokyo, JP;
National University Corporation Hokkaido University, Sapporo, JP;
Hajime Ito, Sapporo, JP;
Hiroaki Iwamoto, Sapporo, JP;
Tsuneo Imamoto, Tokyo, JP;
Ken Tamura, Tokyo, JP;
NIPPON CHEMICAL INDUSTRIAL CO., LTD., Tokyo, JP;
NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, Sapporo, JP;
Abstract
An optically active 2,3-bisphosphinopyrazine derivative represented by the following general formula (1): wherein Rrepresents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, an optionally substituted cycloalkyl group, and an optionally substituted aryl group; Rrepresents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, and an optionally substituted cycloalkyl group, provided that when Ris a tert-butyl group, Rand Rare not the same; Rrepresents a monovalent substituent; n represents an integer of 0 to 4; and * represents an asymmetric center on a phosphorus atom.