Pseudo-Encapsulation-Nanodomains for Enhanced Reactivity in Ionic Liquids
作者:Cameron C. Weber、Anthony F. Masters、Thomas Maschmeyer
DOI:10.1002/anie.201206113
日期:2012.11.12
domains within 1‐alkyl‐3‐methylimidazolium ionicliquids can affect reaction outcomes by pseudo‐encapsulation of reactants and this has been explored for a nucleophilic substitution reaction using a cationic substrate and a range of nucleophiles. The significant rate enhancements observed correlate with the concentration of the polar reactants within the ionicliquid's polar domain. ([CnMIM]=1‐alkyl‐3‐methylimidazolium)
域受限:1-烷基-3-甲基咪唑鎓离子液体中的极性和非极性域可通过反应物的假包封影响反应结果,这已被探索用于使用阳离子底物和一系列亲核试剂的亲核取代反应。观察到的显着速率提高与离子液体极性域中极性反应物的浓度相关。([C n MIM] = 1-烷基-3-甲基咪唑鎓)。
Steric, hydrogen-bonding and structural heterogeneity effects on the nucleophilic substitution of N-(p-fluorophenyldiphenylmethyl)-4-picolinium chloride in ionic liquids
作者:Cameron C. Weber、Anthony F. Masters、Thomas Maschmeyer
DOI:10.1039/c3ob40105g
日期:——
N-(p-fluorophenyldiphenylmethyl)-4-picolinium chloride was investigated using water and a range of alcoholic nucleophiles in ionic liquid solvents. The reactivity patterns across the nucleophiles examined could be attributed to steric factors, which mediated the relative nucleophilicities. Reducing the hydrogen-bond acidity of the ionic liquid cation was found to generally increase the rate of reaction, however