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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
Author(s) -
Zhang Shuying,
Wang Jiaomei,
Liu Xiangxue,
Wang Ke,
Zhang Chao,
Song Hongbing,
Guo Zhenmei,
Lv Zhiguo
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5915
Subject(s) - ionic liquid , catalysis , chemistry , homogeneous catalysis , solubility , homogeneous , endothermic process , chemical engineering , organic chemistry , adsorption , thermodynamics , physics , engineering
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/H 2 O catalytic system and the existence H‐bonding between BSILs and H 2 O. Bibasic sites were confirmed by two endothermic peaks on the TG‐DCS curve of [Aemim]IMC (the CO 2 captured by [Aemim]IM).