Concise Synthesis of Furo[2,3-b]indolines via [3,3]-Sigmatropic Rearrangement of N-Alkenyloxyindoles
作者:Laura L. Anderson、Michael Shevlin、Neil A. Strotman
DOI:10.1055/s-0040-1707250
日期:2021.1
concise new synthetic route to furo[2,3-b]indolines has been developed by taking advantage of the reactivity of N-alkenyloxyindole intermediates. These compounds spontaneously undergo [3,3]-sigmatropic rearrangement followed by cyclization to form hemiaminals as single diastereomers. Tin-promoted N-hydroxyindole formation followed by conjugate addition to activated alkynes provides simple and modular
利用 N-链烯氧基吲哚中间体的反应性,开发了一种简洁的呋喃 [2,3-b] 吲哚啉合成路线。这些化合物自发地经历 [3,3]-σ 重排,然后环化形成作为单一非对映异构体的半缩氨酸。锡促进的 N-羟基吲哚形成,然后与活化炔烃的共轭加成提供了对各种 N-烯氧基吲哚及其相应呋喃 [2,3-b] 吲哚啉的简单和模块化的访问。微型高通量实验用于促进对这种转化的范围和耐受性的研究,并且还评估了对 N-羟基吲哚与卤代芳烃的亲核芳香取代和重排的相关研究。