Highly enantioselective synthesis via dynamic kinetic resolution under transfer hydrogenation using Ru(η6-arene)-N-perfluorosulfonyl-1,2-diamine catalysts:: a first insight into the relationship of ligand's pKa and the catalyst activity

beta-(3,4-Dimethoxyphenyl)serine methyl ester was obtained in high diastereomeric and enantiomeric excesses under transfer hydrogenation using chiral Ru(eta (6)-arene)-N-perfluorosulfonyl-1,2-diamine catalysts.