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。
Kaczmarek, Lukasz; Luniewski, Wojciech; Zagrodzki, Bogdan, Acta poloniae pharmaceutica, 2002, vol. 59, # 3, p. 199 - 207
Synthesis of Quinolines and 2‐Functionalized Quinolines by Difluorocarbene Incorporation
作者:Ben‐Jie Jiang、Song‐Lin Zhang
DOI:10.1002/adsc.202200263
日期:2022.7.5
2-SeH quinolines. In the presence of a second nucleophile such as anilines, competing nucleophilic addition of anilines to the selenoisocyanate is preferred, generating selenourea intermediate. Further nucleophilic addition of the ortho-alkenyl to selenourea followed by elimination of H2Se produces 2-aminoquinolines. This allows one-step multi-component modular preparation of various C2-functionalized
开发了一种通用方法,以允许在二氟卡宾前体存在下从邻-烯基苯胺从头构建喹啉和 C2 官能化喹啉。该方法利用伯苯胺与二氟卡宾缩合原位生成异氰化物的关键反应性。随后通过相邻的烯基α-加成异氰化物构建喹啉环。此外,当存在二氟卡宾前体和硒的组合时,通过邻位亲核加成,初步生成硒代异氰酸酯中间体。-烯基产生 2-SeH 喹啉。在第二亲核试剂如苯胺的存在下,苯胺与硒代异氰酸酯的竞争性亲核加成是优选的,生成硒脲中间体。邻位-烯基进一步亲核加成到硒脲,然后消除 H 2 Se 产生 2-氨基喹啉。这允许从容易获得的起始化合物一步多组分模块化制备各种 C2 官能化喹啉。该方法显示出良好的产率、范围和化学选择性。它操作方便且友好,无需处理令人不快的异氰化物。可利用二氟卡宾使伯胺转化为异氰化物来开发其他有趣的反应。