Directed <i>ortho</i>-metalation–nucleophilic acyl substitution strategies in deep eutectic solvents: the organolithium base dictates the chemoselectivity
作者:Simone Ghinato、Giuseppe Dilauro、Filippo Maria Perna、Vito Capriati、Marco Blangetti、Cristina Prandi
DOI:10.1039/c9cc03927a
日期:——
Directed ortho metalation (DoM) or nucleophilic acylsubstitution (SNAc) can be efficiently programmed on the same aromatic carboxylic acid amide, in a choline chloride-based eutectic mixture, by simply switching the nature of the organolithium reagent. Telescoped, one-pot ortho-lithiation/Suzuki–Miyaura cross-couplings have also been demonstrated for the first time in Deep Eutectic Solvents.
定向邻位金属化(d Ò M)或亲核酰基取代(S Ñ AC)可以有效地设定为在同芳族羧酸酰胺,在基于氯化物胆碱共熔混合物,通过简单地切换有机锂试剂的性质。伸缩式单罐正锂化/铃木-宫浦交叉联结也已在深共晶溶剂中首次得到证明。
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