Patent ID: 6528687
Filing Date: 2003-03-04
Classification: C07B,C07C,C07D,C07F

Abstract:
A process for the preparation of an enantiomerically enriched chiral amine of formula (10), or the opposite enantiomer thereof, from an imine of formula (11) wherein (i) R1 is aryl, R2 is alkyl and R3 is aryl or aryl-CH2â€”, or (ii) R2 is linked with R1 and/or R3 to form one or more rings and R3 or R1 (if not in a ring) is H or a non-interfering organic group, the number of C atoms in each of R1, R2 and R3 being up to 30, which comprises asymmetric hydrogenation of the imine in the presence of a base and, as catalyst, a ruthenium complex of a chiral diphosphine and a chiral diamine.