负载纳米Au-Pd合金催化剂对苄胺氧化偶联合成亚胺的研究（英文）

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

采用浸渍还原法制备了Au/γ-Al_2O_3,Pd/γ-Al_2O_3和Au-Pd/γ-Al_2O_3系列纳米催化剂,考察了催化剂对无碱条件下苄胺自身氧化偶联合成亚胺的反应性能。结果显示3%Au-Pd/γ-Al_2O_3(质量分数)催化剂对伯苄胺自身氧化偶联合成亚胺的反应表现出较好的催化活性,在70℃、常压条件下,不加氧化剂和碱时,亚胺收率可达93%。催化剂能够回收利用,使用循环5次后的催化剂,产物亚胺的收率降到44%。

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 show that the yield of imine could reaches 93% over bimetallic alloy Au-Pd/γ-Al2O3 catalyst, much higher than monometallic Au or Pd nano particle catalyst. The used catalyst is recovered and 44% yield of imine could be obtained after 5 recycling use of Au-Pd/γ-Al2O3.