Abstract

BINAP/Ru(II) complexes catalyze enantioselective hydrogenation of sodium β-keto sulfonates in acidic methanol under atmospheric pressure of hydrogen at 50 °C to give the corresponding β-hydroxy sulfonates with up to 97% ee in a quantitative yield. The sense of asymmetric induction is predictable. The low-pressure hydrogenation process allows the hectogramscale synthesis of a variety of optically active β-hydroxy sulfonates, which attract attention in connection with their functions as surfactants, catalysts, enzyme inhibitors, etc.

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