A heterogeneous catalyst, nanosized MCM-41-Pd, was used to catalyze the Sonogashira coupling of aryl and heteroaryl halides with terminal alkynes in the presence of CuI and triphenylphosphine. The coupling products were obtained in high yields using low Pd loadings to 0.01 mol%, and the nanosized MCM-41-Pd catalyst was recovered by centrifugation of the reaction solution and re-used in further runs without significant loss of reactivity.
使用纳米尺寸的MC
M-41-Pd异质催化剂,在CuI和
三苯基膦的存在下,催化芳基和杂芳基卤化物与末端
炔烃的Sonogashira偶联反应。通过使用低至0.01摩尔%的Pd负载量,偶联产物以高产率获得,并且纳米尺寸的MC
M-41-Pd催化剂通过离心反应溶液进行回收,并在进一步反应中重复使用,活性没有显著损失。