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。
N-Heterocyclic carbene palladium-catalyzed cascade annulation/alkynylation of 2-alkynylanilines with terminal alkynes
A straightforward and highlyeffective N-heterocyclic carbene-palladium catalyzed cascade annulation/alkynylation of 2-alkynylanilines with terminal alkynes has been enabled to afford free (NH)-3-alkynylindole derivatives in moderate to good yields. This protocol features mild conditions, broadsubstratescope, and high atom- and step-economy. Notably, the resultant 3-alkynylindoles could be conveniently
Silver-catalyzed one-pot cyclization/fluorination of 2-alkynylanilines: highly efficient synthesis of structurally diverse fluorinated indole derivatives
作者:Lei Yang、Yuanhong Ma、Feijie Song、Jingsong You
DOI:10.1039/c3cc49851d
日期:——
Highly efficient approaches to obtain structurally diverse fluorinated indolederivatives have been realized through the Ag-catalyzed one-pot cyclization/fluorination of 2-alkynylanilines in the presence of NFSI or Selectfluor.
Synthesis of functionalised 2,3-dihydroquinolin-4(1<i>H</i>)-ones <i>vs.</i> quinoline or <i>N</i>-alkenylindole derivatives through sequential reactions of 2-alkynylanilines with ketones
diversity-oriented synthesis of 2,2,3-substituted-2,3-dihydroquinolin-4(1H)-ones vs. functionalised quinoline or N-alkenylindole derivatives through Brønsted acid mediated or Lewisacid catalyzed sequential reactions of 2-alkynylanilines with ketones. In particular, a series of challenging quinolin-4-one derivatives are prepared with good functional group tolerance in an atom-economical fashion by using p-toluenesulfonic