A modified procedure for the palladium catalyzed borylation/Suzuki-Miyaura cross-coupling of aryl and heteroaryl halides utilizing bis-boronic acid
作者:Gary A. Molander、Sarah L.J. Trice、Brittany Tschaen
DOI:10.1016/j.tet.2015.04.026
日期:2015.9
A modified Pd-catalyzed method of forming aryl- and heteroarylboron species and a two-step, one-pot borylation/Suzuki-Miyaura cross coupling using the atom economical tetrahydroxydiboron (bis-boronic acid, BBA) is reported. By using ethylene glycol as an additive, the new method results in increased yields, lower BBA loading, faster reaction times, and a broader reaction scope, including previously
报道了一种修饰的Pd催化的形成芳基和杂芳基硼物种的方法,以及使用经济的四羟基二硼原子(双硼酸,BBA)进行两步一锅的硼化/铃木-宫浦交叉偶联的方法。通过使用乙二醇作为添加剂,新方法可提高收率,降低BBA负载量,缩短反应时间并扩大反应范围,包括以前存在问题的底物,例如杂环化合物。