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. 15, 1997
Filed:
Mar. 13, 1996
Takasago International Corporation, Tokyo, JP;
Abstract
An optically active 2-diphenylphosphinomethyl-2'-diphenylphosphinyl-1,1'-binaphthalene derivative represented by the following general formula (I) ##STR1## wherein R represents a phenyl group, a tolyl group, an anisyl group or a chlorophenyl group, and a process for the production of optically active substances in which the above compound and a transition metal compound are used. The asymmetric diphosphine of the present invention is related to the creation of novel compounds, which is excellent as a ligand for asymmetric synthesis use. When the above compound is used together with a transition metal compound such as of ruthenium, rhodium or the like, it shows markedly excellent properties as the catalyst of asymmetric hydrogenation and the like reactions, in terms of selectivity, conversion ratio, catalytic activity and the like.