【摘要】 本文研究了以 3 ,4 -二羟基 -2 ,5 -己二酮为原料制备 4 -羟基 -2 ,5 -二甲基 -3 (2H)呋喃酮的实验方法 ,讨论了主要因素对得率的影响 ,得到了制备的较佳条件 :pH值为 6.5 ,3 ,4 -二羟基 -2 ,5 -己二酮浓度为 1 0 % ,反应温度为1 0 0℃ ,反应时间为 1 6小时 ,哌啶浓度为 7.5 % ,此条件下 ,4 -羟基 -2 ,5 -二甲基 -3 (2H)呋喃酮得率为 5 5 %。更多还原

【Abstract】 The synthetic method of 4-Hydroxy-2,5-Dimethyl-3(2H)-Furanone using 3,4-dihydroh exane-2,5-dione as start substance was studied in this article. Some main affect ing factors were discussed and the optimal conditions were obtained as following : pH 6.5, concentration of 3, 4-dihydrohexane-2, 5-dione in reaction mixture 10% , temperature 100℃, time 32 hours, concentration of piperidine in reaction mixt ure 7.5%. In optimal condition, the percentage yield is 55%.更多还原