Chemoselective acylation of benzimidazoles with phenylacetic acids under different Cu catalysts to give fused five-membered N-heterocycles or tertiary amides
作者:Shaoyu Mai、Yingwei Zhao、Qiuling Song
DOI:10.1039/c6ob01167e
日期:——
bond formation via a copper-catalyzed aerobic oxidative decarboxylative tandem protocol was realized. The phenylacetic acids which contain ortho-X (X = F or Br) on the aromatic ring will render a fused five-membered heterocycle via a tandem aromatic nucleophilic substitution and aerobic oxidative decarboxylative acylation at the C(sp2)–H bond of benzimidazoles under the Cu(OAc)2/K2CO3/BF3·Et2O catalytic
通过铜催化的好氧氧化脱羧串联方案实现了C–N键的形成。在芳环上含有邻-X(X = F或Br)的苯乙酸将通过串联芳族亲核取代和苯并咪唑的C(sp 2)-H键上的好氧氧化脱羧酰化反应,形成稠合的五元杂环在Cu(OAc)2 / K 2 CO 3 / BF 3 ·Et 2 O催化体系下,以CuBr为催化剂,吡啶为碱,发生N-酰化反应,得到叔酰胺。