Iron-Enhanced Reactivity of Radicals Enables C–H Tertiary Alkylations for Construction of Functionalized Quaternary Carbons
作者:Yu Yamane、Kohei Yoshinaga、Michinori Sumimoto、Takashi Nishikata
DOI:10.1021/acscatal.8b04872
日期:2019.3.1
is one of the most attractive catalysts, especially for aromatic C–H functionalizations. However, stoichiometric amounts of oxidants and strong carbanions are required, and C–H tertiary alkylation, especially with electron-deficient alkyl groups, is unexplored. In this paper, we describe the development of iron-catalyzed selective C–H tertiary alkylations with heteroaromatics, in which an iron salt
铁是最有吸引力的催化剂之一,特别是对于芳族CHH功能化而言。但是,需要化学计量的氧化剂和强碳负离子,并且尚未开发C–H叔烷基化,尤其是缺乏电子的烷基。在本文中,我们描述了杂芳族化合物在铁催化的选择性C–H叔烷基化反应中的发展,其中铁盐充当单电子源,并增强了由α-溴羰基化合物生成的叔烷基的反应性。我们建立的方法论已在非常简单的条件下有效合成各种季碳原子中得到了证明。