<i>N</i>-Phenoxyamides as Multitasking Reagents: Base-Controlled Selective Construction of Benzofurans or Dihydrobenzofuro[2,3-<i>d</i>]oxazoles
作者:Ming Li、Jia-Hui Wang、Wei Li、Cheng-Dong Lin、Lin-Bao Zhang、Li-Rong Wen
DOI:10.1021/acs.joc.9b00858
日期:2019.7.5
selectively construct benzofuran and dihydrobenzofuro[2,3-d]oxazole derivatives has been successfully established by means of base-controlled cyclization of N-phenoxyamides with 1-[(triisopropylsilyl)ethynyl]-1,2-benziodoxol-3(1H)-one (TIPS-EBX). N-phenoxyamides as multitasking reagents have triggered two different cascade reaction sequences. This is the first example of using TIPS-EBX for the transformation
通过用1-[((三异丙基甲硅烷基)乙炔基] -1,2-苯并恶多酚-3对N-苯氧酰胺进行碱控制的环化,成功建立了选择性构造苯并呋喃和二氢苯并呋喃[2,3- d ]恶唑衍生物的有效方法。(1 H)一(TIPS-EBX)。N-苯氧酰胺作为多任务试剂已触发了两个不同的级联反应序列。这是使用TIPS-EBX在无金属条件下将C(sp)转换为C(sp 2)或C(sp 3)的第一个示例。