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:
Aug. 04, 2009
Filed:
Mar. 25, 2008
Michimasa Watanabe, Toyama, JP;
Yuhki Takeuchi, Toyama, JP;
Takahiro Isobe, Toyama, JP;
Tadashi Takeuchi, Toyama, JP;
Michimasa Watanabe, Toyama, JP;
Yuhki Takeuchi, Toyama, JP;
Takahiro Isobe, Toyama, JP;
Tadashi Takeuchi, Toyama, JP;
Daiichi Fine Chemical Co., Ltd., Toyama, JP;
Abstract
A compound represented by the following general formula (I): [wherein Rrepresents hydrogen atom, or an alkyl group, Rrepresents a hydroxyalkyl group, or a triarylmethyloxyalkyl group, or Rand Rcombine together to represent —C(R)(R)— (Rand Rrepresent hydrogen atom, an alkyl group, or hydroxyl group, or Rand Rmay combine together to represent oxo group), or —C(R)(R)—O—C(R)(R)— (Rto Rrepresent hydrogen atom, an alkyl group, or hydroxyl group, or Rand Rmay combine together to represent oxo group, and Rand Rmay combine together to represent oxo group); Arto Arindependently represent an aryl group (the aryl group may have 1 to 5 of the same or different substituents), *1 to *4 indicate asymmetric carbons, and configurations are cis between *1 and *2, cis between *3 and *4, and trans between *2 and *3]. An optically active phosphine ligand which can be easily synthesized and gives a transition metal complex showing superior asymmetric catalyst activity is provided.