Catalytic cycle for the asymmetric hydrogenation of prochiral ketones to chiral alcohols: direct hydride and proton transfer from chiral catalysts trans-Ru(H)(2)(diphosphine)(diamine) to ketones and direct addition of dihydrogen to the resulting hydridoamido complexes. - Abdur-Rashid K; Faatz M; Lough AJ; Morris RH (Journal of the American Chemical Society, 2001)