Synthesis of 2, 2, 4‐trimethyl‐1, 3‐pentaerediol monoisobutyrate catalyzed by homogeneous catalysis‐liquid/liquid separation catalytic system based on Bibasic sites Ionic Liquids.

Herein a novel homogeneous catalysis‐liquid/liquid separation catalytic system based on 1, 8‐diazabicyclo‐[5.4.0] undec‐7‐ene (DBU)‐functionalized, 1, 1, 3, 3‐tetramethyl guanidine‐functionalized and imidazolium‐functionalized bibasic sites ionic liquids (BSILs) ([HDBU]IM, [Aemim]IM, [TMG]IM, [Aemim]Pro, [Aemim]Gly, [HDBU]Pro and [HDBU]Gly) with a room temperature liquid/liquid phase transition characteristic were reported. And for the first time, this novel catalytic system was employed for the synthesis of 2, 2, 4‐trimethyl‐1, 3‐pentaerediol monoisobutyrate (CS‐12), achieving homogeneous catalysis, easy recycling and long service‐life of the catalyst. Additionally, the mechanism of homogeneous catalysis‐biphasic separation might be explained by the solubility of reactant and product in BSILs/H2O catalytic system and the existence H‐bonding between BSILs and H2O. Bibasic sites were confirmed by two endothermic peaks on the TG‐DCS curve of [Aemim]IMC (the CO2 captured by [Aemim]IM). [ABSTRACT FROM AUTHOR]