the corresponding bis-thiolated indolederivatives. The advantages of the reaction include metal-free, room-temperature, mild reaction conditions and broad functional group compatibility. The reaction proceeds via nucleophilic addition of an alkanethiol to an isonitrile moiety, 5-exo cyclization, followed by nucleophilic addition of an alkanethiol to a 3-alkylidene indole intermediate. Density functional
An efficient synthesis of tetrazolo[1,5‐a]quinolines employing the reaction of o‐alkynylisocyanobenzenes with sodium azide is described. The reaction proceeds through the nucleophilic addition of the azide to the isocyanide and a subsequent by 6‐endo cyclization.
描述了邻炔基异氰基苯与叠氮化钠反应的四唑并[1,5- a ]喹啉的有效合成方法。该反应通过将叠氮化物亲核加成到异氰化物中,然后进行6-内环化来进行。
Facile access to 2-hydroxy-2-substituted indole-3-ones <i>via</i> a copper-catalyzed oxidative cyclization of 2-arylethynylanilines
paper reports a practical and versatileoxidativecyclization of 2-arylethynylanilines towards 2-hydroxy-2-substituted indol-3-ones via a copper-catalyzed radical approach in the presence of O2. The transformation of 2-hydroxy-2-arylindol-3-ones to 3-hydroxy-3-arylindol-2-ones proceeds well with good yields and highlights the practicability and utility of this catalytic system. Mechanistic investigations
本文报道了在 O 2存在下通过铜催化的自由基方法将 2-芳基乙炔基苯胺氧化环化为 2-羟基-2-取代的吲哚-3-酮的实用且通用的方法。2-hydroxy-2-arylindol-3-ones 向 3-hydroxy-3-arylindol-2-ones 的转化进展顺利,产率高,突出了该催化体系的实用性和实用性。机理研究表明,2-芳基乙炔基苯胺上的乙酰基取代基在环状产物的形成中起着重要作用,反应通过基于N中心自由基的5-内-地格氮杂环化途径进行。
Tetrabutylammonium chloride-triggered 6-endo cyclization of o-alkynylisocyanobenzenes: an efficient synthesis of 2-chloro-3-substituted quinolines
A highly efficient one-pot synthesis of 2-chloro-3-substituted quinolines has been developed by tetrabutylammonium chloride-triggered 6-endo cyclization of o-alkynylisocyanobenzenes, which are generated in situ by dehydration of the corresponding N-(2-ethynylphenyl)formamides. (C) 2009 Elsevier Ltd. All rights reserved.