Ionic Liquid Promoted Diazenylation of <i>N</i>-Heterocyclic Compounds with Aryltriazenes under Mild Conditions
作者:Dawei Cao、Yonghong Zhang、Chenjiang Liu、Bin Wang、Yadong Sun、Ablimit Abdukadera、Haiyan Hu、Qiang Liu
DOI:10.1021/acs.orglett.6b00605
日期:2016.5.6
aryltriazenes using Brønsted ionic liquid as a promoter has been developed for the first time. Many N-heterocyclic azo compounds were synthesized in good to excellent yields at room temperature under an open atmosphere. Notably, the promoter 1,3-bis(4-sulfobutyl)-1H-imidazol-3-ium hydrogen sulfate could be conveniently recycled and reused with the same efficacies for at least four cycles.
首次开发了一种有效,温和且无金属的方法,该方法使用Brønsted离子液体作为促进剂直接用芳基三氮烯直接将N-杂环化合物进行二氮烯化。在室温下,在开放气氛下,以良好至优异的产率合成了许多N-杂环偶氮化合物。值得注意的是,促进剂1,3-双(4-磺丁基)-1 H-咪唑-3-硫酸氢盐可以方便地再循环并以相同的效率重复使用至少四个循环。