Asymmetric Hydrogenation of α-Amino Esters into Optically Active β-Amino Alcohols through Dynamic Kinetic Resolution Catalyzed by Ruthenabicyclic Complexes
Racemic α-substituted α-amino esters were hydrogenated into enantioenriched β-amino alcohols throughdynamickineticresolution with chiral ruthenabicyclic complexes. The reaction was carried out with a substrate/catalyst molar ratio of 200–1000 under 15 atm of H2 at 25 °C to afford a variety of β-substituted β-aminoethanols in up to 96% ee (24 examples). The mechanistic studies including deuteration