Gold-Catalyzed Reactions of 2-Alkynyl-phenylamines with α,β-Enones
摘要:
The gold-catalyzed reaction of 2-alkynyl-phenylamines with alpha,beta-enones represents a new general one-pot entry into C-3-alkyl-indoles by sequential reactions. Gold-catalyzed sequential cyclization/alkylation, N-alkylation/cyclization, or N-alkylation/cyclization/alkylation reactions leading to different indoles can be directed by changing the 2-alkynyl-phenylamine 1/alpha,beta-enone 3 ratio and the reaction temperature. Unusual gold-catalyzed rearrangement reaction of indoles are observed at 140 degrees C. New gold-catalyzed formation of propargyl-alkyl ether under mild conditions and the hydration reaction of N-acetyl-2-ethynyl-phenylamine are reported.
Sequential Silver‐Catalyzed Oxidative Cyclization Reactions of Unprotected 2‐Alkynylanilines to Anthranils
作者:Antonio Arcadi、Marco Chiarini、Luana Del Vecchio、Fabio Marinelli、Véronique Michelet
DOI:10.1002/ejoc.201601600
日期:2017.4.26
oxidative cyclization reactions of unprotected 2-alkynylanilines with Oxone are described. The influences of several parameters including the substrate features, oxidant, reaction conditions, and catalyst on the reaction outcome were explored. A plausible mechanism is provided for the unusual silver-catalyzed oxidative cyclization reactions of 2-alkynylanilines to anthranils.
描述了未保护的 2-炔基苯胺与 Oxone 的原始 Ag 催化多米诺氧化环化反应的全部细节。探讨了包括底物特征、氧化剂、反应条件和催化剂在内的几个参数对反应结果的影响。为 2-炔基苯胺到邻氨基苯甲酸的不寻常的银催化氧化环化反应提供了一种合理的机制。
The PdCl2-catalyzed sequential heterocyclization/Michael addition cascade in the synthesis of 2,3-disubstituted indoles
作者:Donala Janreddy、Veerababurao Kavala、Chun-Wei Kuo、Ting-Shen Kuo、Chiu-Hui He、Ching-Fa Yao
DOI:10.1016/j.tet.2013.01.081
日期:2013.4
A cascade reaction of 2-N-unprotected-2-alkynylanilines and various electron-deficient alkenes in the presence of PdCl2 provided 2,3-disubstituted indole derivatives, whereas, in the presence of Pd(OAc)(2), the same reaction resulted in the production of N-alkylated-2-alkynylaniline derivatives. (C) 2013 Elsevier Ltd. All rights reserved.