Synthesis of benz[5,6]azepino[4,3-b]indoles by 1,7-electrocyclisation of azomethine ylides
摘要:
A new, general route to the benz[5,6]azepino[4,3-b]indole ring system has been developed via the 1.7-dipolar electrocyclisation reactions of azomethine ylides derived from easily available 3-formyl indole derivatives. The intermediacy of azomethine ylides vas shown by the trapping of the proposed alpha, beta: gamma, delta-conjugated dipole with N-phenylmaleimide. (C) 2004 Elsevier Ltd. All rights reserved.
[EN] PROCESSES FOR PREPARING INDOLES<br/>[FR] PROCÉDÉS DE PRÉPARATION D'INDOLES
申请人:UNIV NANYANG TECH
公开号:WO2013095304A1
公开(公告)日:2013-06-27
Methods for the synthesis of an indole in provided. Methods comprise oxidizing a N-aryl imine in the presence of a palladium-based catalyst, an oxidant, and a solvent.
提供了合成吲哚的方法。方法包括在钯基催化剂、氧化剂和溶剂的存在下氧化N-芳基亚胺。
BF3·OEt2-Catalyzed Synthesis of anti-β-(N-Arylamino)-α-hydroxynitriles by Regio- and Diastereospecific Ring Opening of 3-Aryloxirane-2-carbonitriles with Anilines
作者:Chuangchuang Xu、Yang Lu、Kaini Xu、Jiaxi Xu
DOI:10.1055/s-0039-1690243
日期:2020.2
anti-β-(N-arylamino)-α-hydroxynitriles from 3-aryloxirane-2-carbonitriles and anilines was developed under the catalysis of BF3·OEt2 in ethanol. In this method, BF3·OEt2 first reacts with ethanol to produce the true catalyst of super acid H[B(OEt)F3], followed by an acid-catalyzed regio- and diastereospecific ring opening of oxirane-2-carbonitriles with anilines, generating anti-β-(N-arylamino)-α-hydroxynitriles
Oxygenophilic Lewis Acid Promoted Synthesis of 2-Arylindoles from Anilines and Cyanoepoxides in Alcohol
作者:Chuangchuang Xu、Jiaxi Xu
DOI:10.1021/acs.joc.8b02203
日期:2018.12.7
A convenient synthetic method to indoles from anilines and cyanoepoxides was developed under the catalysis of BF3·OEt2 or AlCl3 in alcohols. The reaction involves a tandem reaction of the regiospecific ring-opening of cyanoepoxides with anilines, elimination of cyanide, intramolecular aromatic electrophilic substitution, and water elimination. The Lewis acid generated protic acid is an efficient catalyst
Pd-PEPPSI-IPent<sup>Cl</sup>: a new highly efficient ligand-free and recyclable catalyst system for the synthesis of 2-substituted indoles via domino copper-free Sonogashira coupling/cyclization
initiation), is used as a first class recyclable catalytic system for the synthesis of 2-substituted indoles via domino copper-free Sonogashira coupling/cyclization. The catalyst showed a greater performance in the cascade reaction of various 2-bromo anilines with different terminalacetylenes under mild (60 °C) and green conditions (ethanol : water) even in the absence of a copper catalyst and an