Asymmetric Hydrogenation of Ethyl Pyruvate using Layered Double Hydroxides-Supported Nano Noble Metal Catalysts

摘要

Layered double hydroxide (LDH)-supported nano noble metal heterogeneous catalysts are synthesized by ion exchange of K2PtCl6,Na2PdCl4 and impregnation of RhCl_33H_2O followed by reduction with H2.The LDH-Rh,Pt,and Pd catalysts are tested in the enantioselective hydrogenation of ethyl pyruvate to ethyl lactate with very good yields and enantiomeric excess's (e.e.'s) of up to 72% were obtained with Pt.The catalyst was recovered and reused for several cycles with consistent activity.