Expeditious and practical synthesis of tertiary alcohols from esters enabled by highly polarized organometallic compounds under aerobic conditions in Deep Eutectic Solvents or bulk water
作者:Andrea F. Quivelli、Giovanna D’Addato、Paola Vitale、Joaquín García-Álvarez、Filippo M. Perna、Vito Capriati
DOI:10.1016/j.tet.2020.131898
日期:2021.2
of tertiary alcohols via nucleophilic addition of organometallic compounds of s-block elements (Grignard and organolithium reagents) to esters performed in the biodegradable choline chloride/urea eutectic mixture or in water. This approach displays a broad substrate scope, with the addition reaction proceeding quickly (20 s reaction time) and cleanly, at ambient temperature and under air, straightforwardly
开发了一种有效的方案,用于通过在可生物降解的氯化胆碱/脲共晶混合物中或水中将s嵌段元素的有机金属化合物(格氏试剂和有机锂试剂)亲核加成到酯中来合成叔醇。该方法显示了广泛的底物范围,加成反应在环境温度和空气中快速(20 s反应时间)且干净地进行,可直接提供预期的叔醇,收率可达98%。该方法的实用性通过一些代表性的S-三苯甲基-1-半胱氨酸衍生物的可持续合成得到了例证,这些衍生物也是一种有效的Eg5抑制剂,也可以通过望远镜式一锅法进行合成。