摘要
在多种 1,3 二烷基咪唑和烷基吡啶室温离子液体中考察了较温和条件下乙酸钠和氯化苄作用合成乙酸苄酯反应 .在反应温度下 (6 0℃ ) ,熔融的三水合乙酸钠与离子液体相混溶 ,氯苄同乙酸钠作用得到乙酸苄酯 ,它与四氟硼酸 1 乙基 3 甲基咪唑离子液体不溶而分层 .反应结束后产物乙酸苄酯可直接倾析得到 ,乙酸苄酯产率达到 90 %,纯度超过 99%.此离子液体催化体系简化了产物分离 ,离子液体可以重复使用 .
The synthesis of benzyl acetate by sodium acetate and benzyl chloride was investigated in various 1,3-dialkylimidazolium and alkylpyridium ionic liquids. 1-Alkyl-3-methylimidazolium tetrafluoroborate ([C(n)MIm] [BF4]) ionic liquids were found to be an effective solvent and catalyst for the reaction. When the reaction was performed at 60 degreesC, the molten sodium acetate was miscible with 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid but the product benzyl acetate was not. Therefore, the products could be conveniently separated by decantation. The benzyl acetate yield was as high as 90% with > 99% purity. The ionic liquid could be reused for several times and did not lose the catalytic activity.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2002年第9期1571-1574,共4页
Acta Chimica Sinica
