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:
Oct. 26, 2010
Filed:
Mar. 02, 2007
Masakatsu Shibasaki, Bunkyo-ku, JP;
Motomu Kanai, Bunkyo-ku, JP;
Ikuo Fujimori, Bunkyo-ku, JP;
Kenzo Yamatsugu, Bunkyo-ku, JP;
Shin Kamijo, Bunkyo-ku, JP;
Masakatsu Shibasaki, Bunkyo-ku, JP;
Motomu Kanai, Bunkyo-ku, JP;
Ikuo Fujimori, Bunkyo-ku, JP;
Kenzo Yamatsugu, Bunkyo-ku, JP;
Shin Kamijo, Bunkyo-ku, JP;
The University of Tokyo, Tokyo, JP;
Abstract
Disclosed is a novel asymmetric ligand which can be synthesized by a short process at low cost and is capable of exhibiting higher catalytic activity and enantioselectivity than the conventional ligands derived from sugars. Also disclosed are a method for producing such an asymmetric ligand, and a catalyst using such an asymmetric ligand. Specifically disclosed is a ligand represented by the general formula I below or the like. (In the formula, Rand Rindependently represent 0-5 substituents; X represents P, As or N; m represents an integer of 0-7; n represents an integer of 0-3; A-Aindependently represent hydrogen, fluorine, chlorine, bromine, benzoyl or acetyl, or alternatively Aand Acombine together to form a ring.)