Potassium Hydroxide/Dimethyl Sulfoxide Superbase-Promoted Transition Metal-Free Synthesis of 2-Substituted Benzothiophenes under Visible Light
作者:Li Gao、Bin Chang、Wenzhao Qiu、Lele Wang、Xianzhi Fu、Rusheng Yuan
DOI:10.1002/adsc.201501136
日期:2016.4.14
A potassium hydroxide/dimethyl sulfoxide (KOH/DMSO) superbase‐promoted method for the synthesis of 2‐substituted benzothiophenes has been developed via photoinduced intermolecular annulation of 2‐halothioanisoles with terminal alkynes at ambient temperature. The present protocol uses commercially available 2‐halothioanisoles as substrates and visible light as energy force, which offers a wide range
氢氧化钾/二甲基亚砜(KOH / DMSO)超碱促进的合成2-取代的苯并噻吩的方法是在环境温度下通过2-卤代硫代苯甲醚与末端炔烃的光诱导分子间环化反应而开发的。本方案使用市售的2-卤代硫代苯甲醚作为底物,使用可见光作为能量,以中度到良好的产率选择性地提供广泛的苯并噻吩区域。这种简便有效的转化将为合成苯并噻吩衍生物提供一种环境友好的方法。