CO_2-高温液态水介质中的频那醇重排反应  

Pinacol rearrangement in CO_2 enriched high temperature liquid water

作　　者：吕秀阳[1] 任浩明[1] 李准[1] 

机构地区：[1]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《化工学报》2008年第1期96-100,共5页CIESC Journal

基　　金：国家自然科学基金项目(20476089;20674068);高等学校博士学科点专项科研基金项目(20050335099)~~

摘　　要：An environmentally benign method to accelerate the pinacol rearrangement in high temperature liquid water by the addition of CO2 was proposed.The effects of CO2 initial pressure and temperature on the kinetics of pinacol rearrangement were studied.The experimental results showed that the reaction rate could be greatly increased with the addition of CO2.The activation energies evaluated were 81.1 kJ·mol-1 without CO2,and 87.1 kJ·mol-1 with CO2 initial pressure at 0.2 MPa,which showed no significant difference.The main by-product was confirmed to be 2,3-dimethyl-3-butadiene by GC/MS and the possible reaction mechanism was proposed.An environmentally benign method to accelerate the pinacol rearrangement in high temperature liquid water by the addition of CO2 was proposed. The effects of CO2 initial pressure and temperature on the kinetics of pinacol rearrangement were studied. The experimental results showed that the reaction rate could be greatly increased with the addition of CO2. The activation energies evaluated were 81.1 kJ · mol^-1 without CO2, and 87.1 kJ · mol^-1 with CO2 initial pressure at 0.2 MPa, which showed no significant difference. The main by-product was confirmed to be 2,3-dimethyl-3-butadiene by GC/MS and the possible reaction mechanism was proposed.

关 键 词：高温液态水 二氧化碳 重排反应 频那醇 频那酮 

分 类 号：O621.259.1[理学—有机化学] TQ031.2[理学—化学]