The Performance of Supported Au-Pd Alloy Nano Particles Catalyst for Base-free Synthesis of Imines by Self-coupling of Amine

Abstract:

A series of supported nano particles catalysts, Au/γ-Al₂O₃, Pd/γ-Al₂O₃ and Au-Pd/γ-Al₂O₃, were prepared by the impregnation reduction method. The catalytic performance of these catalysts for direct base-free synthesis of imines by self-coupling of benzylamine was investigated. The results showed that the yield of imine could reach 93% over bimetallic alloy Au-Pd/γ-Al₂O₃ catalyst, much higher than monometallic Au or Pd nano particle catalyst. The used catalyst was recovered and 44% yield of imine could be obtained after 5 recycling use of Au-Pd/γ-Al₂O₃.