Copper-Catalyzed Multicomponent Reactions (MCRs) for Disulfenylation of Imidazo[1,2-<i>a</i>]pyridines Using Elemental Sulfur and Arylhalides and Intramolecular Cyclization of Haloimidazo[1,2-<i>a</i>]pyridines
作者:Rashmi Semwal、Chitrakar Ravi、Soumya Saxena、Subbarayappa Adimurthy
DOI:10.1021/acs.joc.9b01632
日期:2019.11.1
Copper-catalyzed synthesis of disulfenylated imidazo[1,2-a]pyridines and indoles using elemental sulfur and haloarenes through one-pot, three component reaction by two C-S-C bond formations has been developed. The method has a broad substrate scope with a variety of substituted haloarenes. The conditions were also applied for the synthesis of benzothieno-imidazo[1,2-a]pyridines in excellent yields
已开发了通过单锅,两个CSC键形成的三组分反应,使用元素硫和卤代芳烃进行铜催化的二硫代咪唑并[1,2-a]吡啶和吲哚的合成。该方法具有广泛的底物范围,具有各种取代的卤代芳烃。该条件还适用于使用硫粉通过2-(2-卤代苯基)咪唑并[1,2-a]吡啶的分子内磺基磺化环化反应以优异的产率(99%)合成苯并噻吩并咪唑并[1,2-a]吡啶。