Optically active phenanthrolines in asymmetric catalysis: II. Enantioselective transfer hydrogenation of acetophenone by rhodium/alkyl phenanthroline catalysts

Abstract Three new alkyl phenanthrolines containing a norpinanyl substituent as the common chiral target, have been synthesized and tested as ligands in the rhodium-catalyzed asymmetric transfer hydrogenation of acetophenone. A marked catalytic activity was observed, but the highest optical yield was 24% e.e.