碘掺杂聚苯胺催化剂催化合成缩醛(酮)  

Catalytic synthesis of acetals and ketals with I_2/PAn

作　　者：杨水金[1] 童文龙[1] 尹国俊[1] 

机构地区：[1]湖北师范学院化学与环境工程系,黄石435002

出　　处：《北京科技大学学报》2006年第3期278-281,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金(No.20471044);湖北省自然科学基金(No.2005ABA053)

摘　　要：制备出单质碘掺杂聚苯胺催化剂I_2／PAn,并以I_2／PAn 为催化剂对以乙酰乙酸乙酯、环己酮、丁酮、苯甲醛和正丁醛与二元醇(乙二醇,1,2-丙二醇)为原料合成10种缩醛(酮)的反应条件进行了研究,重点考察了影响苯甲醛1,2-丙二醇缩醛合成的各种因素．在确定的 n(醛／酮)： n(乙二醇／1,2-丙二醇)=1∶1．6(物质的量的比),催化剂的用量占反应物料总质量的0．2％,反应时间为1h 条件下,10种缩醛(酮)的收率在47．3％～94．2％之间．A new environmental friendly catalyst, I2/Pan, was prepared. The catalytic activities of I2/ PAn in synthesizing 2-methyl-2-ethoxycarbonylmethyl-1, 3-dioxolane, 2, 4-dimethyl-2-ethoxycarhonylmethyl-1, 3-dioxolane, cyclohexanone ethylene ketal, cyclohexanone 1, 2-propanediol ketal, butanone ethylene ketal, butanone 1, 2-propanediol ketal, 2-phenyl-1, 3-dioxolane, 4-methyl-2-phenyl-1, 3-dioxolane, 2-propyl-1, 3-dioxolane, and 4-methyl-2-propyl-1, 3-dioxolane were reported. It is demonstrated that I2/PAn is an excellent catalyst. Various factors concerned in these reactions were investigated. An optimum condition was found, that is, the molar ratio of aldehyde/ketone to glycol is 1/1.6, the mass ratio of the catalyst used to the reactants is 0.2 %, and the reaction time is 1.0 h. Under the optimum condition, the yields of these 10 kinds of acetals/ketals are 47.3 % -94.2 %.

关 键 词：碘 缩醛 缩酮 聚苯胺 催化 

分 类 号：TQ423.26[化学工程] TQ426.91