Microwave-Assisted Cascade Strategy for the Synthesis of Indolo[2,3-<i>b</i>]quinolines from 2-(Phenylethynyl)anilines and Aryl Isothiocynates
作者:Wajid Ali、Anjali Dahiya、Ramdhari Pandey、Tipu Alam、Bhisma K. Patel
DOI:10.1021/acs.joc.6b02912
日期:2017.2.17
The in situ generated o-alkynylthioureas obtain by reacting 2-(phenylethynyl)anilines and aryl isothiocynates undergo efficient cascade cyclization in the presence of Ag2CO3 to form indoloquinolines under microwave heating. The present tandem process allows the generation of a variety of indolo[2,3-b]quinolines derivatives in good to moderate yields with a wide functional group tolerance.
通过使2-(苯基乙炔基)苯胺与异硫氰酸芳基酯反应获得的原位生成的邻炔基硫脲在微波加热下在Ag 2 CO 3存在下进行有效的级联环化反应形成吲哚喹啉。本发明的串联方法允许以良好的至中等的产率产生具有宽泛的官能团耐受性的多种吲哚并[2,3- b ]喹啉衍生物。