求这段操作的细节讨论? 大家帮我看看这段说的后处理具体细节 The cation core is assembled by the reaction of 1-butylimidazole with 2-bromopropylamine hydrobromide in etha- nol. After 24 h under reflux, the ethanol is removed in vacuo and the solid residue dissolved in a minimal quantity of water that is brought to pH 8 by the addition, in small portions, of solid KOH. The product imidazolium bromide is then separated from the KBr byproduct by evaporation of the water, followed by extraction of the residue with ethanol-THF, in which the imidazolium salt is soluble. Subsequent ion exchange with NaBF 4 in ethanol/water gives the product salt 1 in 58% overall yield. NMR and FAB-MS verify the structure and composition of the new IL.查看更多0个回答 . 2人已关注