New couple: A novel combination of phosphine and phosphoramidite groups is applied to the preparation of pseudo-C2-symmetric triphosphorous bidentate phosphine–phosphoramidite ligands 1. Unprecedented enantioselectivities toward ortho-substituted aryl enamides and a 1-naphthylenamide in Rh-catalyzed hydrogenation reactions are obtained.
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Zhang et al. (2006) studied this question.
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