title: Selective hydrogenation of benzophenones to benzhydrols. Asymmetric synthesis of unsymmetrical diarylmethanols
abstract: [reaction: see text] trans-RuCl2[P(C6H4-4-CH3)3]2(NH2CH2CH2NH2) acts as a highly effective precatalyst for the hydrogenation of a variety of benzophenone derivatives to benzhydrols that proceeds smoothly at 8 atm and 23-35 degrees C in 2-propanol containing t-C4H9OK with a substrate/catalyst ratio of 2000-20000. Use of a BINAP/chiral diamine Ru complex effects asymmetric hydrogenation of various ortho-substituted benzophenones and benzoylferrocene to chiral diarylmethanols with consistently high ee.
authors.affiliation: Department of Chemistry and Research Center for Materials Science, Nagoya University, Chikusa, Japan.
authors.initials: T
authors.lastname: Ohkuma
authors.initials: M
authors.lastname: Koizumi
authors.initials: H
authors.lastname: Ikehira
authors.initials: T
authors.lastname: Yokozawa
authors.initials: R
authors.lastname: Noyori