Palladium-Catalyzed/Copper-Mediated Desulfurization and Arylation of Quinoline-2-(1H)-thione for Rapid Access to Quinoline Derivatives
作者:Hai-Long Lu、Fu-Hu Guo、Tong-Lin Wang、Xi-Cun Wang、Zheng-Jun Quan
DOI:10.1055/s-0039-1690765
日期:2020.3
An efficient method for carbon–carbonbond formation is described. The process employs the palladium-catalyzed and copper-mediated cross-coupling of quinoline-2-(1H)-thiones with arylboronic acids or alkynes through C–S bondcleavage without an inert atmosphere. The method provides rapid and general access to a diverse range of 2-substituted quinolines in a single step from a wide range of quinoline-2-(1H)-thiones
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
Metal-Free Synthesis of 2-Fluoroalkylated Quinolines Using Polyfluoroalkanoic Acids as Direct Fluorine Sources
作者:Jiang Nan、Yan Hu、Pu Chen、Yangmin Ma
DOI:10.1021/acs.orglett.9b00039
日期:2019.4.5
A novel [5 + 1] cyclization of 2-vinylanilines with polyfluoroalkanoic acids under catalyst- and additive-free conditions was successfully implemented. The approach directly employs very low-cost and readily available polyfluoroalkanoic acids as both C1 synthons and fluoroalkyl building blocks. This method provides concise access to diverse 2-fluoroalkylated (CF3, C2F5, C3F7, CF2H, CF2Cl, and CF2Br)
在无催化剂和无添加剂的条件下,成功地实现了多氟链烷酸对2-乙烯基苯胺的新型[5 +1]环化反应。该方法直接采用成本非常低廉且易于获得的多氟链烷酸作为C1合成子和氟代烷基构件。该方法可以简便地获得高收率的多种2-氟烷基化(CF 3,C 2 F 5,C 3 F 7,CF 2 H,CF 2 Cl和CF 2 Br)喹啉,并具有优异的官能团耐受性,且收率高。克秤。
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
A heterogeneous catalytic and solvent-free approach to 1,2-dihydroquinoline derivatives from aromatic amines and alkynes by tandem hydroarylation-hydroamination
作者:Vasu Amrutham、Agliullin Marat Radikovich、Naresh Mameda、Krishna Sai Gajula、Nellya Gennadievna Grigor'eva、Kutepov Boris Ivanovich、Venugopal Akula、Narender Nama
DOI:10.1016/j.catcom.2019.105888
日期:2020.2
catalyst-induced one-step synthesis of substituted dihydroquinolines through a hydroarylation/hydroamination cascade reaction undersolvent-freeconditions. A sol-gel method was utilized to prepare the ASM catalyst using tetraethyl orthosilicate (TEOS) and aluminum nitrate (Al(NO3)3.9H2O). The catalytic protocol, utilizing simple starting materials and a heterogeneouscatalyst in a clean reaction environment