羧酸离子液体/氧气催化氧化芳甲醇  

Catalytic oxidation of aryl methyl alcohols over carboxylate ionic liquid/O_(2)

作　　者：吴丰田 吴玲 谢宗波[2] WU Fengtian;WU Ling;XIE Zongbo(Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices,East China University of Technology,Nanchang 330013,Jiangxi,China;Jiangxi Province Key Laboratory of Synthetic Chemistry,East China University of Technology,Nanchang 330013,Jiangxi,China)

机构地区：[1]东华理工大学江西省聚合物微纳制造与器件重点实验室院,江西南昌330013 [2]东华理工大学,江西省合成化学重点实验室,江西南昌330013

出　　处：《精细化工》2023年第3期689-696,共8页Fine Chemicals

基　　金：江西省科技计划项目(20202BABL213021);江西省教育厅科技项目(GJJ210718)。

摘　　要：在组合体系“1-乙基-3-甲基咪唑乙酸盐([EMIm][OAc])/O_(2)”作用下,以芳甲醇为原料,经氧化反应,合成了系列芳甲醛(酮)类化合物。通过对条件进行优化,得到适宜反应条件为:芳甲醇与1-乙基-3-甲基咪唑乙酸盐物质的量比为1∶1、O_(2)压力为0.20MPa、温度为130℃、时间为12h。在此条件下,实现了苯甲醛的克级规模制备,得到20种芳甲醛(酮),产率为62%~96%。提出了[EMIm][OAc]通过阴离子作用于苯甲醇,经O_(2)氧化,脱水得到苯甲醛的反应机理。A series of aromatic formaldehydes(ketones)were synthesized via oxidation of aryl methyl alcohols in the presence of combination system"1-ethyl-3-methylimidazolium acetate([EMIm][OAc])and O_(2)".Under the optimized conditions of n(aryl methyl alcohols)∶n([EMIm][OAc])=1∶1,O_(2)pressure of 0.20 MPa,reaction temperature of 130℃,and reaction time of 12 h,the gram-scale synthesis of benzaldehyde was achieved and 20 kinds of formaldehydes(aromatic ketones)with a yield ranging 62%~96% were obtained.Moreover,the oxidation mechanism of benzyl alcohols,via interaction with anion[OAc]of[EMIm][OAc],O_(2)oxidation and dehydration,to form benzaldehyde was proposed.

关 键 词：离子液体 氧气 氧化 芳甲醇 芳甲醛 精细化工中间体 

分 类 号：O652.7[理学—分析化学]