摘要
本文采用一步环合法合成了N-甲基咪唑,再由N-甲基咪唑和溴代正丁烷合成了中间体溴化1-丁基-3-甲基咪唑,中间体再经过离子交换得到1-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)离子液体.在该离子液体介质中,氯苄和乙酸钠反应高效合成了乙酸苄酯.结果表明:以[bmim]BF4为溶剂和催化剂乙酸钠与苄氯的摩尔比为1.4:1,反应温度为60℃,反应时间为2.5 h,氯苄转化率可达95%.而且产物易于分离,离子液体可重复使用.中间体和产物结构经FT-IR表征.
N-methylimidazole is synthesized by a step of cyclelazation. The intermediate 1-Butyl-3-methylimdazoli- um bromide is synthesized from 1-methylimidazole and 1-bromobutane. After ion exchanging, 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquids is obtained. The benzyl acetate is synthesizied by sodium acetate and benzyl chloride in the ionic liquid. The results show that the solvent and catalyst is [ bmim] BF4 ; the molar ratio of sodium acetate and benzyl chloride is 1.4 ： 1 ; the reaction temperature is 60℃ ;the reaction time is 2.5 hours and the transformation ratio of benzyl chloride can reach 95 %. The product is easy to separate and the ionic liquid can be reused. The intermediate and product are characterized by FT-IR.
出处
《湖南工程学院学报（自然科学版）》
2008年第1期80-83,共4页
Journal of Hunan Institute of Engineering(Natural Science Edition)
