Chiral diaminodiphosphine-ruthenium(II) complexes were
found to be excellent catalysts for the asymmetric transfer hydrogenation
of heteroaromatic ketones in propan-2-ol. In the presence of potassium
hydroxide, the enantioselective reduction of heteroaromatic ketones
proceeded smoothly to give chiral alcohols with excellent enantiomeric
excess (up to 97% ee) under mild conditions without reduction
of the heterocycle.
asymmetric - transfer hydrogenation - catalysis - heteroaromatic ketones - heteroaromatic
alcohols