第 38 卷第 4 期Vol. 38 No. 4
2008 年 8 月Aug 2008

所属栏目:香精香料

由α-异佛尔酮催化合成3,5,5-三甲基-1,2-环己二酮的研究
钟文周,邢孔强,尹笃林,王季惠,毛丽秋 (湖南师范大学 精细催化合成研究所,湖南 长沙 410081)
摘 要:以α-异佛尔酮为原料,经过碱性条件下过氧化氢环氧化和固体酸催化重排合成3,5,5-三甲基-1,2-环己二酮。考察了反应温度、反应时间、反应溶剂对重排反应的影响。优化条件为:以无水氯化锌作催化剂,二氯甲烷作溶剂,回流反应30 min,2,3-环氧异佛尔酮于回流温度下可完全转化,产物的选择性达87.4%。
关键词:催化;α-异佛尔酮;3,5,5-三甲基-1,2-环己二酮
中图分类号:O643.32  文献标识码:A  文章编号:1009-9212(2008)04- 0038-03
Catalytic Synthesis of 3,5,5-Trimethyl-1,2-cyclohexanedione from Rearrangment and Oxidation of α-Isophorone
ZHONG Wen-zhou,XING Kong-qiang,YIN Du-lin,WANG Ji-hui,MAO Li-qiu (Institute of Fine Catalysis and Synthesis,Hunan Normal University,Changsha 410081,China)
Abstract:3,5,5-Trimethyl-1,2-cyclohexanedione was synthesized from α-isophorone through epoxidation under alkaline condition and rearrangment catalyzed by solid acid. The influence of reaction temperature,reaction time and reaction solvent on the rearrangment was investigated. It is found that 2,3-epoxyisophorone can be converted under the mild condition. The selectivity of 3,5,5-trimethyl-1,2-cyclohexanedione was 87.4% from the rearrangment of the epoxides catalyzed by zinc chloride in CH2Cl2 reflux for 30 min.
Key words:catalytsis;α-isophorone;3,5,5-trimethyl-1,2-cyclohexanedione
基金项目:国家自然科学基金资助项目(20572021),湖南师范大学青年基金资助科研项目(070643)。
作者简介:钟文周(1978-),男,湖南邵阳人,硕士研究生,主要从事精细有机合成的研究。(E-mail:zwenz79@163.com)
收稿日期:2008-06-27