Iridium‐Catalyzed Hydrochlorination and Hydrobromination of Alkynes by Shuttle Catalysis
作者:Peng Yu、Alessandro Bismuto、Bill Morandi
DOI:10.1002/anie.201912803
日期:2020.2.10
Described herein are two different methods for the synthesis of vinyl halides by a shuttle catalysis based iridium-catalyzed transfer hydrohalogenation of unactivated alkynes. The use of 4-chlorobutan-2-one or tert-butyl halide as donors of hydrogen halides allows this transformation in the absence of corrosive reagents, such as hydrogen halides or acid chlorides, thus largely improving the functional-group
本文描述了通过未活化炔烃的基于铱催化的转移氢卤化的穿梭催化来合成卤乙烯的两种不同方法。使用 4-氯丁烷-2-酮或叔丁基卤化物作为卤化氢的供体,可以在没有腐蚀性试剂(例如卤化氢或酰基氯)的情况下进行这种转化,从而大大提高了官能团耐受性和安全性。这些反应与最先进的反应相比。该方法可以制备含有酸敏感基团的烯基卤化合物,例如叔醇、甲硅烷基醚和缩醛。这些方法的合成价值已通过实现低催化剂负载的克级合成得到证明。