Regiospecific Synthesis of 2-Halo-3-(2′-glucalyl)benzo[<i>b</i>]thiophenes
作者:Henok H. Kinfe、Felix L. Makolo、Christian K. Adokoh
DOI:10.1021/jo5012762
日期:2014.8.15
A regiospecific synthetic strategy for the synthesis of 2-chloro-3-substituted benzo[b]thiophenes is developed via a dichlorocarbene insertion and sigmatropic rearrangement of an in situ generated ylide. The current protocol provides a reversed regiochemistry to the commonly employed electrophilic cyclization reaction for the synthesis of benzo[b]thiophenes and access to their hitherto under-represented
通过二氯卡宾插入和原位生成的叶立德的σ重排,开发了用于合成2-氯-3-取代的苯并[ b ]噻吩的区域特异性合成策略。目前的方案提供了与常用的亲电子环化反应相反的区域化学反应,以用于合成苯并[ b ]噻吩并获得迄今代表性不足的氯化衍生物。