Transition-Metal-Catalyst-Free Cross-Coupling Reaction of Secondary Propargylic Acetates with Alkenyl- and Arylboronic Acids
作者:Mitsuhiro Ueda、Daiki Nakakoji、Takahiro Morisaki、Ilhyong Ryu
DOI:10.1002/ejoc.201701450
日期:2017.12.22
A cross-coupling reaction between secondary propargylic acetates and alkenylboronic acids proceeded to give 1,4-enynes in good yields without adding transition metal catalyst and base. This simple protocol was also applicable to arylboronic acids, which gave 3-arylated alkynes in good yields. The observed induction period suggested that the reaction of propargylic acetates and organoboronic acids was
在不添加过渡金属催化剂和碱的情况下,仲炔乙酸酯和烯基硼酸之间的交叉偶联反应以良好的收率得到 1,4-烯炔。这个简单的方案也适用于芳基硼酸,它以良好的产率得到 3-芳基化炔烃。观察到的诱导期表明丙炔乙酸酯和有机硼酸的反应受到原位生成的 AcOH 作为催化剂的影响,这通过单独的实验得到证实。