Catalysis by Ionic Liquids: Significant Rate Acceleration with the Use of [pmIm]Br in the Three-Component Synthesis of Dithiocarbamates
作者:Brindaban C. Ranu、Amit Saha、Subhash Banerjee
DOI:10.1002/ejoc.200700842
日期:2008.1
An easily accessible neutral ionic liquid, 1-methyl-3-pentylimidazolium bromide, promoted a one-pot three-component condensation of an amine, carbon disulfide, and an activated alkene/dichloromethane/epoxide to produce the corresponding dithiocarbamates in high yields at room temperature. The reactions are very fast in ionic liquids relative to those in other reaction media. These reactions do not
一种易于获得的中性离子液体,1-甲基-3-戊基咪唑溴化物,促进了胺、二硫化碳和活性烯烃/二氯甲烷/环氧化物的一锅三组分缩合反应,在室温下以高产率制备相应的二硫代氨基甲酸酯温度。与在其他反应介质中的反应相比,离子液体中的反应速度非常快。这些反应不需要任何额外的催化剂或溶剂。离子液体可回收再循环用于后续反应。提出了一个合理的机制。