Exploiting Deep Eutectic Solvents and Organolithium Reagent Partnerships: Chemoselective Ultrafast Addition to Imines and Quinolines Under Aerobic Ambient Temperature Conditions
作者:Cristian Vidal、Joaquín García-Álvarez、Alberto Hernán-Gómez、Alan R. Kennedy、Eva Hevia
DOI:10.1002/anie.201609929
日期:2016.12.23
the long‐held dogma that organolithium chemistry needs to be performed under inert atmospheres in toxic organic solvents, chemoselective addition of organolithium reagents to non‐activated imines and quinolines has been accomplished in green, biorenewable deep eutectic solvents (DESs) at room temperature and in the presence of air, establishing a novel and sustainable access to amines. Improving on
打破了长期存在的教条,即需要在惰性气氛下在有毒有机溶剂中进行有机锂化学反应,在室温下,在绿色,可生物再生的深共熔溶剂(DES)中,将有机锂试剂化学选择性添加到非活化的亚胺和喹啉中已经完成。在空气中存在,建立了一种新颖且可持续的胺接触途径。在现有方法的基础上,该方法在没有添加剂的情况下进行了改进。发生时没有竞争性的烯醇化,还原或偶联过程;反应在几秒钟内完成。将DES中的RLi反应性与在纯甘油或THF中观察到的反应性进行比较,表明发生了烷基化试剂的动力学阴离子活化,与竞争性水解相比,亲核加成更为有利。