α，β-不饱和酮的绿色环氧化

Green Epoxidation of α,β-Unsaturated Ketones

以过氧化氢为氧源,磷钨杂多酸季铵盐为催化剂,研究了α,β-不饱和酮的环氧化反应,考察了溶剂、温度、催化剂用量、反应时间以及底物浓度等因素对环氧化反应的影响.结果表明,在适宜反应条件下,过氧化氢/磷钨杂多酸季铵盐催化体系可以催化α,β-不饱和酮环氧化,得到相应的环氧化合物,并能取得较好的结果.其中,4-甲基-3-戊烯-2-酮的环氧化合物的产率达到了87%.

In the presence of H2O2, the epoxidation of α,β-unsaturated ketones catalyzed by quaternary ammonium heteropolyphosphatotungstate was studied. The factors such as different solvents, reaction temperature, the catalyst amount, reaction time, and the substrate concentration were investigated. It was found that the epoxidation of α,β-unsaturated ketones was easily performed in this catalytic system. Under the optimized reaction conditions an epoxy-4-methyl-3-penten-2-one yield of 87% was obtained.