Halogen-Free Room-Temperature Brønsted Acidic Ionic Liquid [Hmim]<sup>+</sup> HSO<sub>4</sub> <sup>−</sup> as a Recyclable Green “Dual Reagent” Catalysis for the Synthesis of Triarylmethanes (TRAM<scp>s</scp>)
作者:Chhanda Mukhopadhyay、Arup Datta、Pradip Kumar Tapaswi
DOI:10.1080/00397911.2011.560742
日期:2012.8.15
halogen-free Brønsted acidic ionic liquid methylimidazolium hydrogen sulfate ([Hmim]+ HSO4 −) acts as a very efficient catalyst for the one-pot, two-component Baeyer condensation of a variety of aromatic aldehydes with dimethyl or diethyl aniline at room temperature. This “green” reagent behaves as both catalyst and solvent; that is, it exhibits “dual-reagent catalysis.” The room-temperature acidic ionic liquid
摘要 无卤 Brønsted 酸性离子液体硫酸氢甲基咪唑鎓 ([Hmim]+ HSO4 -) 是一种非常有效的催化剂,可用于多种芳香醛与二甲基或二乙基苯胺在室温下的一锅双组分拜耳缩合反应。温度。这种“绿色”试剂既是催化剂又是溶剂;也就是说,它表现出“双试剂催化作用”。室温酸性离子液体可以循环多次,反应收率几乎没有损失。这是 Baeyer 合成无卤离子液体的首次报道。图形概要