A facile construction of the spiro[indole-3,2′-pyrrolidine] skeleton, through diacetoxyiodobenzene (PIDA) mediated C–N bond-forming dearomatization of C3 sulfonamide linked indole derivatives, has been developed.
Visible-Light-Driven Selenyl-Radical-Mediated Cascade Spirocyclization of 3-(2-Isocyanobenzyl)indoles with Diselenides
作者:Lin Qi、Li-Jing Wang、Tong-Yang Cao、Yi-Chen Dong、Jie-Hui Cao
DOI:10.1055/a-2131-3551
日期:2023.10
We present a facile, visible-light-driven, selenyl-radical-mediated, cascade spirocyclization of 3-(2-isocyanobenzyl)indoles with diselenides that affords various selenylated spiro[indole-3,3′-quinoline] derivatives under mild conditions. This protocol has good functional-group tolerance and a broad substrate scope; both diaryl and dialkyl diselenides are tolerated.
Direct annulation and alkylation of indoles with 2-aminobenzyl alcohols catalyzed by TFA
作者:Forest J. Robertson、Bradshaw D. Kenimer、Jimmy Wu
DOI:10.1016/j.tet.2011.02.067
日期:2011.6
An efficient method for the annulation of indoles with 2-aminobenzyl alcohols, catalyzed by TFA, to furnish 5,6-fused indoline aminals is reported. This method can be extended to the alkylation of indoles at C3. 2-Aminobenzyl alcohols are used directly without recourse to protection of the aniline nitrogen or activation of the alcohol. (C) 2011 Elsevier Ltd. All rights reserved.
Visible-light-induced radical isocyanide insertion protocol for the synthesis of difluoromethylated spiro[indole-3,3′-quinoline] derivatives
作者:Jingjing Zhang、Wentao Xu、Yi Qu、Yuxiu Liu、Yongqiang Li、Hongjian Song、Qingmin Wang
DOI:10.1039/d0cc06645a
日期:——
protocol for visible-light-induced radical isocyanide insertion reactions between 3-(2-isocyanobenzyl)-indoles and bromodifluoroacetates or bromodifluoroacetamides. The protocol, which has good functional group tolerance and a broad substrate scope, constitutes an efficient and general route to difluoromethylated spiro[indole-3,3′-quinoline] derivatives.