A New Coupling Reaction of Alkyl Iodides with Electron Deficient Alkenes Using Nickel Boride (cat.)−Borohydride Exchange Resin in Methanol
作者:Tae Bo Sim、Jaesung Choi、Meyoung Ju Joung、Nung Min Yoon
DOI:10.1021/jo961751f
日期:1997.4.1
addition reaction of alkyl iodides with alpha,beta-unsaturated esters, nitriles, and ketones proceeds in moderate to excellent yields (50-95%) using Ni(OAc)(2) (0.05-0.2 equiv)-BER (3-5 equiv) in methanol in 1-9 h at room temperature or at 65 degrees C. Nickel boride on borohydride exchange resin (BER) is a good alternative reagent to tributyltin hydride for the coupling of alkyl iodides with the electron
使用Ni(OAc)(2)(0.05-0.2当量)-BER(3-),烷基碘化物与α,β-不饱和酯,腈和酮的自由基加成反应以中等至极好的收率(50-95%)进行在室温下或在65摄氏度下于1-9小时内在甲醇中加入5当量。硼氢化镍交换树脂(BER)上的硼化镍是氢化三丁基锡的良好替代试剂,用于将烷基碘化物与甲醇中的电子不足的烯烃偶联。与氢化三丁基锡方法相比,该方法具有后处理简单的优点,因为可以容易地通过过滤除去硼化镍-BER。