Metal-free and regiospecific synthesis of 3-arylindoles
作者:Chuangchuang Xu、Wenlai Xie、Jiaxi Xu
DOI:10.1039/d0ob00317d
日期:——
arylhydrazine hydrochlorides and Fischer indolization. The organic base triethylamine plays a crucial role in the final elimination step in the Fischer indole synthesis, affording 3-arylindoles regiospecifically. The reaction features advantages of microwave acceleration, non-metal participation, short reaction time, organic acid-base co-catalysis, and broad substrate scope.
Metal-free, C–H arylation of indole and its derivatives with aryl diazonium salts by visible-light photoredox catalysis
作者:Ying-Peng Zhang、Xiao-Long Feng、Yun-Shang Yang、Bi-Xia Cao
DOI:10.1016/j.tetlet.2016.04.051
日期:2016.5
In this Letter, we present the Rhodamine B catalyzed direct C–Harylation of indole with aryl diazonium salts. This method only requires green light and roomtemperature.
A general synthesis of arylindoles and (1-arylvinyl)carbazoles via a one-pot reaction from N-tosylhydrazones and 2-nitro-haloarenes and their potential application to colon cancer
A synthesis of aryl-indoles, and carbazoles from a one-pot sequence involving the coupling of hydrazones with nitro-haloarenes has been developed.
已开发了一种从酰肼与硝基卤代芳烃偶联的一锅法序列中合成芳基吲哚和咔唑。
Transition-Metal-Free C3 Arylation of Indoles with Aryl Halides
作者:Ji Chen、Jimmy Wu
DOI:10.1002/anie.201612311
日期:2017.3.27
We report an unprecedented transitionmetal‐free coupling of indoles with aryl halides. The reaction is promoted by KOtBu and is regioselective for C3 over N. The use of degassed solvents devoid of oxygen is necessary for the success of the transformation. Preliminary studies implicate a hybrid mechanism that involves both aryne intermediates and non‐propagative radical processes. Electron transfer
Asymmetric <i>N</i>-aminoalkylation of 3-substituted indoles by N-protected <i>N</i>,<i>O</i>-acetals: an access to chiral propargyl aminals
作者:Junxian Yang、Zeyuan He、Liang Hong、Wangsheng Sun、Rui Wang
DOI:10.1039/d0ob00795a
日期:——
A direct enantioselective N1 aminoalkylation of 3-substituted indoles is efficiently catalyzed by a phosphoric acid catalyst under mild conditions to afford diverse enantioenriched propargyl aminals. The strategy could be applied to the modification of tryptophan containing oligopeptides. Additionally, structurally diverse and multifunctional transformations of the propargyl aminal products reveal