碘掺杂聚苯胺催化剂催化合成苹果酯  

Catalytic Synthesis of 2-Methyl-2-Ethyl Acetoacetate-1,3-Dioxolane with Iodine Doped Polyaniline

作　　者：杨水金[1] 尹国俊[1] 吕宝兰[1] 

机构地区：[1]湖北师范学院化学与环境工程学院,黄石435002

出　　处：《精细石油化工进展》2011年第10期31-33,共3页Advances in Fine Petrochemicals

基　　金：湖北省自然科学基金资助项目(2005ABA053)

摘　　要：以I2/PAn为催化剂,通过乙酰乙酸乙酯和乙二醇反应合成了苹果酯,探过了I2/PAn对缩酮反应的催化活性,考察了酯醇物质的量比、催化剂用量、反应时间对产品收率的影响。结果表明I,2/PAn是合成苹果酯的良好催化剂,最佳反应条件为:n(乙酰乙酸乙酯)∶n(乙二醇)=1∶1.6,催化剂用量为反应物料总质量的0.6%,环己烷为带水剂,反应时间45 min。上述条件下,苹果酯的收率可达86.2%。2 - Methyl - 2 - ethyl acetoacetate - 1,3 - dioxolane was synthesized by the reaction of acetyla- cetic ester with glycol with Is/PAn as the catalyst, and the effect of Is/PAn on the catalytic activity of ketal re- action as well as the effect of molar ratio of materials, catalyst usage and reaction time on product yield were studied. According to the results, I2/PAn is a good catalyst for synthesizing 2 - methyl - 2 - ethyl acetoacetate -1,3 -dioxolane. The optimum reaction conditions were identified, i.e. n （acetylacetic ester） ：n （glycol） = 1 ： 1.6, percentage of catalyst amount in total mass of reaction materials： 0.6%, water carrying agent： cyclohexane, reaction time ： 45 min. The yield of 2 - methyl - 2 - ethyl acetoacetate - 1,3 - dioxolane can reach 86.2% at above conditions.

关 键 词：苹果酯 碘 聚苯胺 催化 掺杂 

分 类 号：TQ655[化学工程—精细化工]