Ligand-Free, Cu- and Fe-Catalyzed Selective Ring-Opening Arylations of Benzoxazoles with Aryl Iodides
作者:Yue He、Jincheng Mao、Guangwei Rong、Hong Yan、Guoqi Zhang
DOI:10.1002/asia.201600252
日期:2016.6.6
Cu‐ or Fe‐based catalyst systems have been reported to selectively catalyze the N,N‐diarylation or N‐monoarylation of benzoxazoles ring‐opening with aryl iodides in the absence of additional added ligand in polyethylene glycol under an inert atmosphere. Two types of coupling products (triphenylamines and diphenylamines) have been examined and the reaction routes can be simply controlled by changing
据报道,基于铜或铁的催化剂体系可选择性催化N,N二芳基化或N在惰性气氛下,在聚乙二醇中不存在额外添加的配体的情况下,苯并恶唑的开环与芳基碘化物进行单芳基化。已经研究了两种类型的偶联产物(三苯胺和二苯胺),可以通过改变金属盐(铜或铁)作为催化剂来简单地控制反应路线。已经研究了用于各种反应的多种底物,并且以良好至高收率获得了相应的芳基化产物。这种选择性,低成本和环境友好的方案显示出巨大的潜力,可以取代现有方法并扩展苯并恶唑的合成应用。