Visible-Light-Induced Transition-Metal-Free Nitrogen-Centered Radical Strategy for the Synthesis of 2-Acylated 9<i>H</i>-Pyrrolo[1,2-<i>a</i>]indoles
作者:Wen-Qin Yu、Jun Xie、Zan Chen、Bi-Quan Xiong、Yu Liu、Ke-Wen Tang
DOI:10.1021/acs.joc.1c01834
日期:2021.10.1
A convenient and efficient visible-light-induced tandem acylation/cyclization of N-propargylindoles with aryl- or alkyl-substituted acyl oxime esters for the synthesis of 2-acyl-substituted 9H-pyrrolo[1,2-a]indoles under transition-metal-free conditions, which proceeds via nitrogen-centered radical-mediated cleavage of the C–C σ-bond in acyl oxime esters, is established. The aryl or alkyl acyl radicals
N-炔丙基吲哚与芳基-或烷基-取代的酰基肟酯的方便有效的可见光诱导串联酰化/环化,用于合成2-酰基-取代的9 H-吡咯并[1,2- a ]吲哚过渡建立了无金属条件,该条件通过氮中心自由基介导的酰基肟酯中 C-C σ 键的裂解进行。来自酰基肟酯的芳基或烷基酰基自由基攻击N-炔丙基吲哚中的 C-C 三键,然后进行分子内环化/异构化。