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
Base-catalyzed thio-lactamization of 2-(1-arylvinyl)anilines with CS<sub>2</sub> for the synthesis of quinoline-2-thiones
作者:Tong-Lin Wang、Xiao-Jun Liu、Cong-De Huo、Xi-Cun Wang、Zheng-Jun Quan
DOI:10.1039/c7cc07633a
日期:——
that the base-catalyzed thio-lactamization of 2-(1-arylvinyl)anilines with CS2 is a powerful methodology to synthesize quinoline-2-thiones. This thio-lactamization uses inexpensive and versatile 2-(1-arylvinyl)anilines, which are easily available from the reaction of amines and alkynes. Compared to the known strategy in the literature, this method features the advantages like a short synthesis step and
Base-controlled chemoselectivity reaction of vinylanilines with isothiocyanates for synthesis of quinolino-2-thione and 2-aminoquinoline derivatives
作者:Xi Zhang、Tong-Lin Wang、Cong-De Huo、Xi-Cun Wang、Zheng-Jun Quan
DOI:10.1039/c8cc00062j
日期:——
Here, we report a base-controlled chemo-selective reaction of vinylanilines with alkyl/aryl isothiocyanates to afford quinolino-2-thione and 2-aminoquinoline derivatives. The quinolino-2-thiones could be obtained in high yields in the presence of Et3N. Particularly interesting is that the reaction could produce the 2-aminoquinolines in the presence of K3PO4 with high selectivity.
在这里,我们报告乙烯基苯胺与烷基/芳基异硫氰酸酯的碱控制化学选择性反应,以提供喹啉基-2-硫酮和2-氨基喹啉衍生物。在Et 3 N存在下,可以高产率获得喹啉-2--2-硫酮。特别有趣的是,在K 3 PO 4存在下,该反应可以产生2-氨基喹啉,具有高选择性。