Reusable Cu<sub>2</sub>O/PPh<sub>3</sub>/TBAB System for the Cross-Couplings of Aryl Halides and Heteroaryl Halides with Terminal Alkynes
作者:Bo-Xiao Tang、Feng Wang、Jin-Heng Li、Ye-Xiang Xie、Man-Bo Zhang
DOI:10.1021/jo070538o
日期:2007.8.1
Cu2O/PPh3/TBAB (n-Bu4NBr) system for the cross-coupling reactions of aryl and heteroaryl halides with terminal alkynes has been developed. Four types of Cu2O, including bulky Cu2O, cubic Cu2O nanoparticles, octahedral Cu2O nanoparticles, and spherical Cu2O nanoparticles, were examined, and the octahedral Cu2O nanoparticles were found to be the most effective catalyst for the reaction. In the presence of the octahedral
已开发出一种有效且可重复使用的Cu 2 O / PPh 3 / TBAB(n -Bu 4 NBr)系统,用于芳基卤化物和杂芳基卤化物与末端炔烃的交叉偶联反应。检查了四种类型的Cu 2 O,包括大块Cu 2 O,立方Cu 2 O纳米颗粒,八面体Cu 2 O纳米颗粒和球形Cu 2 O纳米颗粒,发现八面体Cu 2 O纳米颗粒是最有效的催化剂反应。在存在八面体Cu 2 O纳米粒子的情况下,PPh 3和TBAB,各种芳基和杂芳基卤化物与炔烃(包括炔醇)的反应均以中等至良好的收率顺利进行。值得注意的是,Cu 2 O / PPh 3 / TBAB系统可以回收并重复使用多次,而不会损失任何活性。