A new synthesis of indoles via intramolecular cyclization of ο-alkynyl N,N-dialkylanilines promoted by KOt-Bu/DMSO
摘要:
2-Aryl indoles could be prepared in excellent yields via the intramolecular cyclization of o-alkynyl N,N-dialkylanilines. The reaction is efficiently promoted by the catalytic amount of KOr-Bu in DMSO at room temperature. A reaction mechanism involving alpha-aminoalkyl radical intermediates is suggested. (C) 2012 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed Cyclization Reaction of <i>o</i>-Iodoanilines, CO<sub>2</sub>, and CO: Access to Isatoic Anhydrides
作者:Wen-Zhen Zhang、Ning Zhang、Yu-Qian Sun、Yu-Wei Ding、Xiao-Bing Lu
DOI:10.1021/acscatal.7b03000
日期:2017.12.1
oxidants. Herein we report a highly selective palladium-catalyzed cyclizationreaction for the efficient synthesis of isatoic anhydrides from readily available o-iodoanilines, CO2, and CO. The reaction proceeds under mild conditions and is redox-neutral. Both CO2 and CO are indispensable C1 building blocks for this catalytic reaction.
A catalyst-free and additive-free method for the synthesis of benzothiazolethiones from <i>o</i>-iodoanilines, DMSO and potassium sulfide
作者:Xiaoming Zhu、Wenguang Li、Xiai Luo、Guobo Deng、Yun Liang、Jianbing Liu
DOI:10.1039/c8gc00477c
日期:——
Under catalyst-free and additive-free conditions, a novel, convenient, environment-friendly method for the synthesis of benzothiazolethiones from o-iodoanilines, K2S and DMSO has been developed.
A carboxylate-assisted palladium-catalysed Catellani reaction, which is compatible with ortho-amination and unactivated C(sp2)–H arylation, synthesized a series of 1-amino substituted dihydrophenanthridines, phenanthridines and 6H-benzo[c]chromenes.
Copper-Catalyzed Three-Component Synthesis of Benzothiazolethiones from <i>o</i>-Iodoanilines, Isocyanide, and Potassium Sulfide
作者:Pan Dang、Weilan Zeng、Yun Liang
DOI:10.1021/ol503186w
日期:2015.1.2
An efficient copper catalyzed strategy for the synthesis of a variety of benzothiazolethione derivatives has been developed. In the presence of CuCl, the three-component reaction of o-iodoanilines and K2S with p-toluenesulfonylmethyl isocyanide proceeded smoothly to obtain the corresponding benzothiazolethiones in good to excellent isolated yields. Notably, isocyanide functioned as a carbon source and K2S functioned as a sulfur source in this reaction.
Copper-Catalyzed Double C–S Bonds Formation <i>via</i> Different Paths: Synthesis of Benzothiazoles from <i>N</i>-Benzyl-2-iodoaniline and Potassium Sulfide
A new, highly efficient procedure for the synthesis of benzothiazoles from easily available N-benzyl-2-iodoaniline and potassium sulfide has been developed. The results show copper-catalyzed double C-S bond formation via a traditional cross-coupling reaction and an oxidative cross-coupling reaction.