A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Safety of N-((1R,2R)-2-Amino-1,2-diphenylethyl)-4-methylbenzenesulfonamide, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 144222-34-4, Name is N-((1R,2R)-2-Amino-1,2-diphenylethyl)-4-methylbenzenesulfonamide, molecular formula is C21H22N2O2S. In a Article, authors is Jolley, Katherine E.，once mentioned of 144222-34-4
An improved method for the synthesis of tethered ruthenium(II) complexes of monosulfonylated diamines is described, together with their application to the hydrogenation of ketones and aldehydes. The complexes were applied directly, in their chloride form, to asymmetric ketone hydrogenation, to give products in excess of 99% ee in the best cases, using 30 bar of hydrogen at 60 C, and to the selective reduction of aldehydes over other functional groups. Copyright
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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI