| 摘要 |
A process for the catalytic hydrogenation or asymmetric hydrogenation of imines of Formula (I) to the corresponding amines of Formula (II) is provided in which R1 is aryl or heteroaryl; R2 is hydrogen, aryl, heteroaryl, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl or heterocyclo; and R3 is C1-2 alkyl, C3-10 cycloalkyl and -CH2-C.ident.C-R6 . The catalytic system includes a ruthenium complex containing (1) a diamine and (2) a diphosphine at two monodentate phosphines ligands. Such process also relates to the asymmetric hydrogenation of prochiral imines to the chiral amines using chiral ruthenium complexes bearing chiral diphosphines or chiral monodentate phosphines and chiral diamines.
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