A dithizone-functionalized polystyrene resin-supported Pd(II) complex as an effective catalyst for Suzuki, Heck, and copper-free Sonogashira reactions under aerobic conditions in water
作者:Mohammad Bakherad、Saeideh Jajarmi
DOI:10.1016/j.molcata.2013.01.009
日期:2013.4
A novel polystyrene-supported palladium(II) dithizone complex is found to be a highly active catalyst for the Suzuki, Heck, and Sonogashira reactions of aryl halides in water. By this protocol, aryl halides, coupled with phenyl boronic acid (Suzuki reaction), alkenes (Heck reaction) or terminal alkyne (Sonogashira reaction), smoothly affords the corresponding cross-coupling products in good to excellent
发现一种新型的聚苯乙烯负载的钯(II)二硫i配合物是水中芳基卤化物的Suzuki,Heck和Sonogashira反应的高活性催化剂。通过该方案,芳基卤化物与苯基硼酸(Suzuki反应),烯烃(Heck反应)或末端炔烃(Sonogashira反应)偶联,以良好或优异的收率平稳地提供了相应的交叉偶联产物。此外,该催化剂显示出良好的热稳定性和可循环性。将该催化剂循环用于Suzuki,Heck和Sonogashira反应五次,而其催化活性没有明显损失且金属浸出可忽略不计。