Fig. 5: Asymmetric hydrogenation of benzophenones 1x and 1b.
From: Asymmetric hydrogenation of 1,1-diarylethylenes and benzophenones through a relay strategy

a Synthesis of 4x by a sequence involving selective arene exchange and stereoselective asymmetric transfer hydrogenation. b Synthesis of 4b by a sequence involving selective arene exchange and stereoselective asymmetric transfer hydrogenation.