Stereospecific Synthesis of <i>E</i>-Alkenes through Anti-Markovnikov Hydroalkylation of Terminal Alkynes
作者:Avijit Hazra、Jason Chen、Gojko Lalic
DOI:10.1021/jacs.9b04800
日期:2019.8.14
We have developed a method for stereospecific synthesis of E-alkenes from terminal alkynes and alkyl iodides. The hydroalkylation reaction is enabled by a cooperative action of copper and nickel catalysts and proceeds with excellent anti-Markovnikov selectivity. We demonstrate the broad scope of the reaction, which can be accomplished in the presence of esters, nitriles, aryl bromides, ethers, alkyl
我们开发了一种从末端炔烃和烷基碘立体有择合成 E-烯烃的方法。加氢烷基化反应是通过铜和镍催化剂的协同作用实现的,并以优异的抗马尔科夫尼科夫选择性进行。我们展示了该反应的广泛范围,该反应可以在酯类、腈类、芳基溴化物、醚类、烷基氯、苯胺和各种含氮杂芳族化合物的存在下完成。机理研究提供的证据表明,铜催化剂通过氢铜作用活化炔烃,从而控制整个反应的区域选择性和非对映选择性。镍催化剂活化烷基碘并促进与烯基铜中间体的交叉偶联。