Palladium-catalyzed direct coupling of 2-vinylanilines and isocyanides: an efficient synthesis of 2-aminoquinolines
作者:Lijie Wang、Jamie Ferguson、Fanlong Zeng
DOI:10.1039/c5ob01659b
日期:——
A variety of 2-aminoquinolines were prepared in good to excellent yields.
一系列2-氨基喹啉以良好至优异的产率制备完成。
Cleavage of C–C Bonds for the Synthesis of C2-Substituted Quinolines and Indoles by Catalyst-Controlled Tandem Annulation of 2-Vinylanilines and Alkynoates
作者:Jixiang Ni、Yong Jiang、Zhenyu An、Rulong Yan
DOI:10.1021/acs.orglett.8b00260
日期:2018.3.16
and alkynoates through C–C bond cleavage is developed. With these general methods, 2-substituted indoles and quinolines can be accessed via tandem Michael addition and cyclization with no requirement of oxidant. This strategy not only provides a method for the synthesis C2-substituted indoles in good yields through the simultaneous cleavage of C═C and C≡C bonds under metal-free conditions but also provides
tert-Butyl nitrite (TBN) as the N atom source for the synthesis of substituted cinnolines with 2-vinylanilines and a relevant mechanism was studied
作者:XiaoBo Pang、LianBiao Zhao、DaGang Zhou、Ping Yong He、ZhenYu An、Ji Xiang Ni、RuLong Yan
DOI:10.1039/c7ob01553d
日期:——
A green method to synthesize cinnolines by 6π electrocyclic reaction with alkenyl amines and TBN has been developed. TBN plays a dual role both as the nitrogen atom source and oxidant in this procedure. Relevant mechanism experiments reveal the reaction proceeds through electrocyclic reaction and with diazo hydroxide as a key intermediate.
Metal-Free Synthesis of 2-Substituted Quinolines via High Chemoselective Domino Condensation/Aza-Prins Cyclization/Retro-Aldol between 2-Alkenylanilines with β-Ketoesters
作者:Jiang Nan、Pu Chen、Yuxin Zhang、Yun Yin、Bo Wang、Yangmin Ma
DOI:10.1021/acs.joc.0c02063
日期:2020.11.6
A highly chemoselective domino condensation/aza-Prinscyclization/retro-aldol between 2-alkenylanilines with β-dicarbonyl compounds under metal-free conditions was accomplished, giving a large category of valuable 2-substituted quinolines in good yields with excellent functional group toleration. This newly established process, adopting β-ketoesters as masked C1 synthons via C–C cleavage, could even
Carbon annulation of ortho-vinylanilines with dimethyl sulfoxide to access 4-aryl quinolines
作者:Jin Yuan、Jin-Tao Yu、Yan Jiang、Jiang Cheng
DOI:10.1039/c6ob02714h
日期:——
A palladium-catalyzed annulation of ortho-vinylanilines with dimethylsulfoxide was developed to access 4-aryl quinolines in moderate to good yields. Activated by 1,4-diazabicyclo[2.2.2]octane bis(sulfur dioxide) adduct (DABSO), DMSO served as a “CH–” fragment in this transformation. It represents a facile pathway leading to 4-aryl quinolines.