RUTHENIUM-DIPHOSPHINE COMPLEXES AND THEIR USE AS CATALYSTS

摘要

Novel complexes, suitable in particular for use as catalysts in the asymmetric hydrogenation of ketones, are of formula (1) or a diastereoisomer thereof, wherein each Ar is an aromatic or heteroaromatic group of up to 20 atoms; X is halide or carboxylate; and R?1, R2, R3, R4¿ are independently hydrogen, aryl or alkyl, optionally linked or part of a ring.