BIS(FERROCENYLPHOSPHINO) FERROCENE LIGANDS USED IN ASSYMETRIC HYDROGENATION REACTIONS

摘要

Abstract Compounds of the formula (I) in the form of racemates, enantiomerically pure diastereomers or a mixture of diastereomers, where the radicals R₁ are identical or different and are each C₁-C₄-alkyl; m is 0 or an integer from 1 to 4; n is 0 or an integer from 1 to 3; p is 0 or an integer from 1 to 5; R₂ is an aromatic hydrocarbon radical or a C-bonded heterohydrocarbon radical and R₃ is an aliphatic or C-bonded heteroaliphatic hydrocarbon radical; R₂ and R₃ are identical or different and are each an aliphatic or C-bonded heteroaliphatic hydrocarbon radical; R₄ is an unsubstituted or C₁-C₆-alkyl-, C₁-C₆-alkoxy- or halogen-substituted hydrocarbon radical; and A is a secondary amino group, are ligands for metal complexes which are suitable as catalysts for homogeneous enantioselective hydrogenation.;