甲基紫罗兰酮的合成  

Synthesis of Isomethyl-ionone

作　　者：黄喜根[1] 赵爱军[1] 习运群[1] 黄双根[1] 刘晓庚[1] 

机构地区：[1]江西农业大学应用化学研究所,江西南昌330045

出　　处：《精细化工》2003年第10期605-608,共4页Fine Chemicals

基　　金：江西省科技厅攻关项目(9920041)

摘　　要：研究了以固载强酸TiO2/SO2-4做催化剂,用假性异甲基紫罗兰酮合成甲基紫罗兰酮的方法。提高了α 异甲基紫罗兰酮的收率,获得了最佳反应条件:投料比n(假性异甲基紫罗兰酮)∶n(二甲苯)∶n(硫酸)=1∶3 5∶0 05,控制反应温度15～25℃,反应时间1 5h。该优化条件下,合成收率为92%～93%,产物中α 异甲基紫罗兰酮质量分数为77%左右。A new method for synthesis of methylionones by cyclization reaction of pseudoisomethylionone under the catalysis of supported strong acid─TiO2/SO42-.The yield of αisomethylionone was improved. The best technological conditions were n(pseudoisomethylionone)∶n(xylene)∶n(sulfuric acid)=1∶3.5∶005,reaction temperature 15-25 ℃ and reaction time 15 h.Under the optimum conditions the yield was 92%-93%,and the content of αisomethylionone in the product was about 77%.

关 键 词：假性异甲基紫罗兰酮 固载强酸催化剂 柠檬醛 α-异甲基紫罗兰酮 环化反应 

分 类 号：TQ655[化学工程—精细化工]