Arynes as Radical Acceptors: TEMPO‐Mediated Cascades Comprising Addition, Cyclization, and Trapping
作者:Maximilian Scherübl、Constantin G. Daniliuc、Armido Studer
DOI:10.1002/anie.202012654
日期:2021.1.11
The application of arynes as radical acceptors is described. The stable radical TEMPO (2,2,6,6‐tetramethyl piperidine 1‐oxyl) is shown to add to various ortho‐substituted benzynes generating the corresponding aryl radicals which engage in 5‐exo or 6‐endo cyclizations. The cyclized radicals are eventually trapped by TEMPO. The introduced method provides ready access to various dihydrobenzofurans, oxindoles
描述了芳炔作为自由基受体的应用。稳定的自由基 TEMPO(2,2,6,6-四甲基哌啶 1-氧基)被证明可以添加到各种邻位取代的苯炔上,生成相应的芳基,参与 5-外环或 6-内环化。环化自由基最终被 TEMPO 捕获。所引入的方法通过概念上新颖的方法提供了容易获得各种二氢苯并呋喃、羟吲哚和磺内酯的方法。