Rhodium-Catalyzed Reaction of Sulfoxonium Ylides and Anthranils toward Indoloindolones via a (4 + 1) Annulation
作者:Xiaopeng Wu、Yan Xiao、Song Sun、Jin-Tao Yu、Jiang Cheng
DOI:10.1021/acs.orglett.9b02249
日期:2019.9.6
A rhodium-catalyzed annulation between aroyl sulfoxonium ylides and anthranils has been developed to synthesize 10H-indolo[1,2-a]indol-10-one derivatives. This reaction started with an unpredented (4 + 1) annulation toward N-(2-formylphenyl) indolones, proceeding with the sequential ortho-amination of the C-H bond in aroyl sulfoxonium ylides by anthranils and the insertion of N-H to carbene. Finally
已开发出铑催化的芳基磺酰氧鎓鎓盐与蒽基之间的环化反应,以合成10H-吲哚并[1,2-a]吲哚-10-酮衍生物。该反应开始于对N-(2-甲酰基苯基)吲哚酮进行无限制的(4 +1)环化反应,接着是蒽基将芳族硫代on鎓烷基化物中的CH键进行顺序邻氨基化,以及将NH插入卡宾。最终,Aldol缩合反应构建了第二个吲哚环。此步骤的特征是在一锅中形成两个CN键和一个C═C键。