A highly efficient heterogeneous copper-catalyzed Chan-Lam coupling between thiols and arylboronic acids leading to diaryl sulfides under mild conditions
作者:Yang Lin、Mingzhong Cai、Zhiqiang Fang、Hong Zhao
DOI:10.1016/j.tet.2016.04.063
日期:2016.6
coupling reaction between thiols and arylboronic acids was achieved in EtOH at room temperature in the presence of 5 mol % of MCM-41-immobilized 1,10-phenanthroline-copper(II) complex [MCM-41-1,10-Phen-CuSO4] with n-Bu4NOH (40% aq) as base under O2 atmosphere, yielding a variety of unsymmetrical diaryl sulfides in good to excellent yields under mild and green conditions. The new heterogeneous copper complex
硫醇与芳基硼酸之间的异质Chan-Lam偶联反应是在室温下,在5%摩尔MCM-41固定的1,10-菲咯啉-铜(II)络合物[MCM-41-1,在O 2气氛下,以n -Bu 4 NOH(40%aq)为碱的10-Phen-CuSO 4 ],在温和和绿色条件下以良好或优异的收率产生各种不对称的二芳基硫化物。新的多相铜络合物可以很容易地通过简单的方法由市售的廉价试剂制备,并通过简单过滤反应溶液进行回收并循环至少八次而不会显着降低催化活性。