Synthesis of substituted quinolines by iron-catalyzed oxidative coupling reactions
作者:Peng Liu、Yuxi Li、Haiyu Wang、Zhiming Wang、Xianming Hu
DOI:10.1016/j.tetlet.2012.09.090
日期:2012.12
A simple and efficient method has been developed for the synthesis of quinoline derivatives from N-alkyl anilines and alkynes or alkenes by iron-catalyzed oxidative couplingreactions. A variety of substituted quinolines are prepared in good to excellent yields.
Microwave-assisted multicomponent domino cyclization–aromatization: an efficient approach for the synthesis of substituted quinolines
作者:Aditya Kulkarni、Béla Török
DOI:10.1039/c001076f
日期:——
microwave-assisted synthesis of substituted quinolines is described. The quinolines were synthesized by a multicomponent domino reaction of anilines, aldehydes and terminal aryl alkynes. The synthetic pathway involves the formation of an imine, followed by the intermolecular addition of an alkyne to the imine. This intermediate immediately undergoes ring closure and oxidative aromatization. The reaction is catalyzed
A simple, efficient, and practical protocol is reported, allowing quick access to diverse 2-arylquinolines from 2-vinylanilines and benzyl halides. This reaction is additive and metal catalyst-free with only solvent needed. A preliminary mechanistic investigation discloses the driving force comes from the in situ released HBr, which catalyzes the subsequent cyclization. The present synthetic route
Photoredox radical cyclization reaction of <i>o</i>-vinylaryl isocyanides with acyl chlorides to access 2,4-disubstituted quinolines
作者:Peng-Fei Huang、Jia-Le Fu、Jia-Jing Huang、Bi-Quan Xiong、Ke-Wen Tang、Yu Liu
DOI:10.1039/d3ob01915b
日期:——
We herein report an efficient photoredox radical cyclizationreaction of o-vinylaryl isocyanides with acyl chlorides to access a wide range of 2,4-disubstituted quinolines. Preliminary mechanism experiment results suggested that this reaction was initiated by an acyl radical generated from acyl chlorides through a single-electron-transfer (SET) process. This transformation showed good substrate suitability