碘催化合成丙酸环己酯

以碘为催化剂,对环己醇与丙酸酐之间的酰化反应进行了研究,考察了反应时间、酐醇摩尔比、催化剂质量对丙酸环己酯收率的影响。实验结果表明,当环己醇的物质的量为0.1mol,酐醇摩尔比为1.1∶1时,催化剂质量为0.08g,回流反应40min后,丙酸环己酯收率可达到92.2%,且所得产品无色透明,纯度为98.7%。重复实验5次表明催化剂具有良好的催化活性。合成反应条件温和,反应时间较短,操作简便。同时对产品的折光率和红外光谱进行了表征。

Synthesis of Cyclohexyl Propionate Catalyzed by Iodine

The acylation of cyclohexanol with propionic anhydride was studied by using iodine catalyst. The effects of different factors such as reaction time, the mole ratio of cyclohexanol to propionic anhydride, the mass of catalyst on the yield of cyclohexyl propionate were investigated. The results show that the best of reaction conditions are as following: 0.1 mole cyclohexanol, the mole ratio of cyclohexanol to propionic anhydride is 1.1∶1 and the mass of catalyst is 0.08 gram. After reacting 40 minutes under refluxing, the yield of cyclohexyl propionate reaches 92.2%. The product is colorless and transparent. The purity of product is 98.7%. The reaction was repeated five times. It is shown that the catalyst exhibit a good catalytic activity. The advtanges of the reaction are mild conditions, shorter reaction time and easy manipulation. The product was characterized by refractive index and IR.