Efficient protocol for Aza-Michael addition of N-heterocycles to α,β-unsaturated compound using [Ch]OH and [<i>n</i>-butyl urotropinium]OH as basic ionic liquids in aqueous/solvent free conditions
作者:Sitanshu Kumar、Amanpreet Kaur、Vasundhara Singh
DOI:10.1080/00397911.2018.1546401
日期:2019.1.17
basic ionic liquid, [n-butyl Urotropinium]OH, and commercially available aqueous solution of choline hydroxide [Ch]OH as catalysts for executing Aza-Michael addition of N-heterocycles to α,β-unsaturated compounds at room temperature. The highlighting features of these catalysts include using low concentration of both catalysts along with [Ch]OH being low cost and biodegradable, [n-butyl Urotropinium]OH
摘要 目前的工作强调使用设计和合成的碱性离子液体 [n-丁基乌洛托品]OH 和市售的氢氧化胆碱 [Ch]OH 水溶液作为催化剂进行 N-杂环的 Aza-Michael 加成的绿色方法。 α,β-不饱和化合物在室温下。这些催化剂的突出特点包括使用低浓度的两种催化剂以及低成本和可生物降解的 [Ch]OH,[正丁基乌洛托品]OH 显着提高了高底物/催化剂比,从而以高产率和纯度获得所需的产品在大多数情况下。此外,两种催化剂都可循环使用,最多可回收五次。图形概要