A simple method was developed for selective para-cyanation of alkoxy- and benzyloxy-substituted benzenes with 0.5 equivalents of potassium ferricyanide, 0.8 equivalants of copper(II) nitrate and 0.5 equivalents of iodine in acetonitrile. Among various phenyl carbon-hydrogen bonds, those at the para-position with regard to the alkoxy or benzyloxy groups were selectively cyanated in 20% to 87% yields
MCM-41-immobilized 1,10-phenanthroline–copper(<scp>i</scp>) complex: a highly efficient and recyclable catalyst for the coupling of aryl iodides with aliphatic alcohols
作者:Yang Lin、Mingzhong Cai、Zhiqiang Fang、Hong Zhao
DOI:10.1039/c6ra19825b
日期:——
A heterogeneous C–O coupling reaction between aryl iodides and aliphatic alcohols was achieved in neat alcohol or toluene at 110 °C in the presence of 10 mol% of the MCM-41-immobilized 1,10-phenanthroline–copper(I) complex [MCM-41-1,10-phen–CuI] with Cs2CO3 as a base, yielding a variety of aryl alkyl ethers in good to excellent yields. The new heterogeneous copper catalyst can easily be prepared by
在存在10 mol%的MCM-41固定的1,10-菲咯啉-铜(I)络合物的存在下,在110°C的纯醇或甲苯中,芳基碘化物和脂肪醇之间的异质C-O偶联反应得以实现[以Cs 2 CO 3为碱的MCM-41-1,10-phen-CuI] ,可产生各种芳基烷基醚,收率好至极佳。新的多相铜催化剂可以很容易地通过简单的方法由市售和廉价的试剂制备,并通过过滤反应溶液进行回收并循环至少8次而不会显着降低活性。