The asymmetric Rh-catalyzed hydrogenation of β,β-disubstituted α-acetamido acrylates, which are notoriously difficult substrates, is possible using readily available BINOL-derived monodentate phosphites or phosphonites. Essentially quantitative conversion and enantioselectivities of 95-97% ee are readily achieved, making the process industrially viable.
amino acids - asymmetric catalysis - hydrogenations - rhodium - chiral auxiliaries