Efficient synthesis of pyrano[4,3-b]indol-1(5H)-ones from CO2 and alkynyl indoles promoted by a protic ionic liquid
作者:Chun Li、Jian Jiang、Linlin Li、Ling Zhang、Qian Chen、Mengna Wang、Changli Fu、Lin Zhang
DOI:10.1016/j.tetlet.2020.152449
日期:2020.10
An efficient method was developed for the synthesis of pyrano[4,3-b]indol-1(5H)-ones, which uses a protic ionic liquid [HTBD+][TFE–] as both the solvent and reaction promoter. The reactions could be efficiently carried out at atmospheric pressures of CO2, and various pyrano[4,3-b]indol-1(5H)-ones bearing versatile functionalities were obtained in moderate to high yields (71–99%).
开发了一种高效的吡喃并[4,3 - b ]吲哚-1(5 H)-酮的合成方法,该方法使用质子离子液体[HTBD + ] [TFE – ]作为溶剂和反应促进剂。该反应可以在大气压的CO 2压力下有效地进行,并以中等至高产率(71-99%)获得了具有多种功能的吡喃并[4,3 - b ]吲哚-1(5 H)-。