固载杂多酸催化合成2,4-二甲基-2-(4-甲基-3-戊烯基)-1,3-二氧五环  

Catalytic synthesis of 2,4-dimethyl-2-(4-methyl-3-pentenyl)-1,3-dioxolane by supported heteropoly acid

作　　者：彭安顺[1] 夏闽[1] 金学勇[1] 

机构地区：[1]临沂师范学院化学与环境科学系,山东临沂276005

出　　处：《化学研究与应用》2003年第2期229-230,共2页Chemical Research and Application

摘　　要：2,4Dimethyl2(4methyl3Pentenyl)1,3dioxolane were synthesized with the phosphotungstic acid supported on cationic exchange resin as a catalyst.Various factors that affect the condensation yield were investigated.The results showed that the optimum conditions were as follows:6methyl5heptene2one:1,2Propandiol:catalyst:dehydrating agent is 1 mol:15mol∶12g∶200ml;reaction temperature was reflux temperature;reaction time was 25h.The yield was above 915% under the optimum conditions.The catalyst can be used repeatedly.2,4Dimethyl2(4methyl3Pentenyl)1,3dioxolane were synthesized with the phosphotungstic acid supported on cationic exchange resin as a catalyst.Various factors that affect the condensation yield were investigated.The results showed that the optimum conditions were as follows:6methyl5heptene2one:1,2Propandiol:catalyst:dehydrating agent is 1 mol:15mol∶12g∶200ml;reaction temperature was reflux temperature;reaction time was 25h.The yield was above 915% under the optimum conditions.The catalyst can be used repeatedly.

关 键 词：固载杂多酸 催化合成 2 4-二甲基-2-(4-甲基-3-戊烯基)-1 3-二氧五环 离子交换树脂 环缩酮 香料 

分 类 号：TQ655[化学工程—精细化工] O643.36[理学—物理化学]