CHIRALE DIPHOSPHONITE ALS LIGANDEN IN DER RUTHENIUM-KATALYSIERTEN ENANTIOSELEKTIVEN REDUKTION VON KETONEN, ß-KETOESTERN UND KETIMINEN

摘要

Chiral ruthenium complexes are disclosed, obtained by reaction of a ruthenium salt with a chiral diphosphonite. Chiral diols with the general structure given in scheme 1 are preferably used as chiral diphosphonites. Said ruthenium complexes can be simply and economically obtained and provide high enantioselectivity on reduction of ketones, beta-ketoesters and ketimines.