[Bmim]Cl-AlCl_3催化蒽与2-氯丙烷的Friedel-Crafts烷基化  

Friedel-Crafts alkylation of anthracene with 2-chloropropanecatalyzed by [Bmim]Cl-AlCl_3 ionic liquid

作　　者：袁新华[1] 陈敏[2] 戴起勋[1] 程晓农[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]江苏大学化学化工学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2009年第3期261-264,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(20207003);江苏省"青蓝工程"优秀青年骨干教师项目;江苏大学拔尖人才项目

摘　　要：研究了在氯代1-甲基-3-丁基咪唑([Bmim]Cl-AlCl3)离子液体室温催化下,多环芳烃蒽与2-氯丙烷的Friedel-Crafts烷基化反应.GC/MS分析表明反应生成了精细化工中间体2-异丙蒽;用GC考察了不同反应条件对2-异丙蒽收率和选择性的影响,AlCl3在[Bmim]Cl-AlCl3离子液体中的物质的量比为0.67,m([Bmim]Cl-AlCl3):m(蒽)=8:1,n(2-氯丙烷):n(蒽)=1.5:1,反应温度30℃,反应时间4h时,2-异丙蒽的收率和选择性最高,分别为69.2%和77.1%.[Bmim]Cl-AlCl3离子液体对环境无污染,且可循环使用.经萃取、重结晶等方法得到2-异丙蒽纯品,并通过GC,GC/MS,FTIR和1HNMR对反应产物进行了定性和定量测试.To obtain novel fine chemicals, [ Bmim ]Cl-AlCl3（ [ Bmin ] ＋ = 1 - butyl - 3 - methylimidazolium cation） ionic liquid was used as catalyst in the Friedel - Crafts alkylation of anthracene with 2 - chloropropane. Fine chemical intermediate of 2 -isopropylanthracene was prepared and confirmed by GC/MS analysis. The influences of various reaction conditions on the yield and selectivity of 2 - isopropylanthracene were studied by GC analysis. The results show that the optimum conditions of the alkylation reaction are as follows ： reation temperature of 30℃ for 4 h while the molar fraction of A1CI3 in [ Bmim ] Cl-AlCl3 to be 0.67, m（ [ Bmim] Cl-AlCl3 ）： m（anthracene） = 8： 1, n（2 - chloropropane） ： n（ anthracene） = 1.5： 1. Under the optimum condition, the yield and selectivity of 2 -isopropylanthracene are 69.2 % and 77.1% , respectively. The present study shows that [ Bmim ] Cl-AlCl3 is not only a novel environmental-friendly catalyst and solvent but also can be reused. The structure of 2 - isopropylanthracene was identified by GC/MS, FTIR and 1H NMR analyses.

关 键 词：离子液体 催化 烷基化 蒽 2-异丙蒽 精细化工中间体 

分 类 号：O625.15[理学—有机化学]