Palladium‐Catalyzed Tail‐to‐Tail Reductive Dimerization of Terminal Alkynes to 2,3‐Dibranched Butadienes
作者:Hongyu Guo、Sheng Zhang、Yang Li、Xiaoqiang Yu、Xiujuan Feng、Yoshinori Yamamoto、Ming Bao
DOI:10.1002/anie.202116870
日期:2022.3.21
a combination of pivalic acid and para-toluenesulfonic acid proved successful in favoring the selective highly chemo- and regioselective tail-to-tail reductive dimerization of terminal alkynes over the competitive head-to-tail dimerization pathway. The target reaction, proposed to proceed via a cationic alkenyl palladium intermediate, presents a facile and straightforward approach for accessing 2,3-dibranched
使用新戊酸和对甲苯磺酸的组合证明成功地有利于末端炔烃的选择性高度化学和区域选择性的尾对尾还原二聚化,而不是竞争性的头对尾二聚化途径。建议通过阳离子链烯基钯中间体进行的目标反应为获得 2,3-二支化丁二烯提供了一种简便直接的方法。