A PEG bridged tertiary amine functionalized ionic liquid exhibiting thermoregulated reversible biphasic behavior with cyclohexane/isopropanol: synthesis and application in Knoevenagel condensation

Abstract

A novel poly(ethylene glycol) bridged tertiary amine functionalized ionic liquid PEG₈₀₀-DPIL(Cl) was synthesized. It can form a temperature driven reversible biphasic system with cyclohexane/isopropanol mixed solvent. This biphasic system was applied in Knoevenagel condensation up to 99%. PEG₈₀₀-DPIL(Cl) could be simply recovered and recycled for several runs.