Optically active diphosphine compound, method for making the com

Details Optically active diphosphine compound, method for making the com Optically active diphosphine compound, method for making the com

1997-08-26

1998-12-08

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus containing

568 17, C07F 952

Patent

active

058472223

ABSTRACT:
The present invention provides a ligand for a novel catalyst superior in such characteristics as selectivity (chemoselectivity and enantioselectivity) and catalytic activity in asymmetric synthesis reactions and a ligand for a novel catalyst effective in an asymmetric hydrogenation reaction in particular. The ligand is an optically active diphosphine compound represented by the following formula: ##STR1## where Ph is a phenyl group, X is a chlorine or bromine atom, and R.sup.1 and R.sup.2 are each an alkyl group having 1 to 3 carbon atoms.

REFERENCES:
patent: 4556740 (1985-12-01), Hansen
patent: 5516944 (1996-05-01), Broger
patent: 5621128 (1997-04-01), Jendralla

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