A General Direct Arylation of Polyfluoroarenes with Heteroaryl and Aryl Chlorides Catalyzed by Palladium Indolylphosphine Complexes
作者:On Ying Yuen、Mueangkaew Charoensak、Chau Ming So、Chutima Kuhakarn、Fuk Yee Kwong
DOI:10.1002/asia.201500048
日期:2015.4
The first general examples of direct coupling of heteroaryl chlorides, especially substituted 2‐pyridyl chlorides which were previously found to be problematic, with electron‐deficient polyfluoroarenes are reported. Pd(OAc)2 associated with 3‐(dicyclohexylphosphino)‐2‐phenylindole L1 serves as the effective catalyst which allows the challenging direct coupling of heteroaryl chlorides and polyfluoroarenes
报道了杂芳基氯,特别是取代的2-吡啶基氯与先前的有电子缺陷的多氟芳烃直接偶联的第一个一般实例。与3-(二环己基膦基)-2-苯基吲哚L1缔合的Pd(OAc)2是有效的催化剂,可实现具有挑战性的杂芳基氯化物和多氟芳烃的直接偶联。除杂环外,在该催化剂体系下还可以使用多种非活化和活化的芳基氯化物和链烯基氯化物。可以实现低至1 mol%Pd的催化剂负载量。