PROCESS FOR PRODUCING AMINO-ACIDS AND ESTERS THEREOF WITH CATALYTIC HYDROGENATION OF ACRYLIC ACIDS AND ESTERS

摘要

Optically active diphosphines of the formula: R1 CH2--CH--CH2--P ANGLE R2 ¦¦ R'1 CH2--CH--CH2--P ANGLE R'2 in which the phosphinomethyl groups are trans to each other, form rhodium complexes useful as catalysts in hydrogenating substituted acrylic acids and their esters to optically active propionic acid derivatives.