OPTICALLY ACTIVE DIPHOSPHINES AND METHOD FOR PREPARING SAME BY RESOLUTION OF THE RACEMIC MIXTURE

摘要

Optically active diphosphines and a method for preparing same by resolution of the racemic mixture of said diphosphines into optically active isomers, are disclosed. Novel optically active diphosphines of bis-[1-phospha-2,3-diphenyl-4,5-dimethylnorbornadiene], and a method for the resolution of the racemic mixture of bis-[1-phospha-2,3-diphenyl-4,5-dimethylnorbornadiene], wherein said mixture is reacted with a palladium or platinum complex as the chiral auxiliary in an organic solvent to form diastereoisomeric complexes, and the optically pure complexes are subjected to resolution, are also disclosed. Furthermore, novel optically active metal complexes including said phosphines, and the use thereof in a method for preparing optically active carboxylic acids and/or derivatives thereof, by means of a method for hydrogenating alpha - beta -unsaturated carboxylic acids and/or derivatives thereof, are disclosed.