An efficient Pd-catalysed Sonogashira coupling reaction was achieved in the absence of copper and amine with inorganic base using phosphene-free, air stable di(1H-benzo[d][1,2,3]triazol-1-yl)methane as ligand. The cross coupling of electron-rich, electron-defficient and hindered aryl halides with terminal alkynes afforded the internal alkynes in good to excellent yields.
在不含
铜和胺的情况下,使用无膦、空气稳定的二(1H-苯并[d][1,2,3]三唑-1-基)
甲烷作为
配体,配合高效
钯催化的Sonogashira偶联反应,在
无机碱存在下成功实现。富电子、缺电子及位阻的芳基卤化物与末端
炔烃的交叉偶联反应,均能以良好至优异的产率得到内部
炔烃。