A facile protocol for copper‐free palladium‐catalyzed Sonogashira coupling in aqueous media
作者:Da‐Young Jung、Soo Youl Park、Seung‐Hoi Kim
DOI:10.1002/bkcs.12432
日期:2022.1
combination of a readily available palladium catalyst and an eco-friendly basic aqueous solution of room-temperature ionic liquid, choline hydroxide (ChOH), was used in a facile protocol alternative to the Sonogashira coupling reaction, alkynylation of aryl halides in the absence of a copper cocatalyst and an external base. The dual nature of ChOH to act as a base and a green solvent played a crucial role in
容易获得的钯催化剂和环境友好的室温离子液体碱性水溶液氢氧化胆碱 (ChOH) 的组合被用于替代 Sonogashira 偶联反应的简便方案,即在不存在芳基卤化物的情况下进行炔基化铜助催化剂和外部碱。ChOH 作为碱和绿色溶剂的双重性质在催化循环中起着至关重要的作用。尽管反应结果很大程度上取决于底物,但偶联反应在确定的条件下有效地进行以形成 Csp Csp2 键。