【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.更多还原

【Abstract】 To obtain novel fine chemicals,[Bmim]Cl-AlCl3([Bmin]+=1-butyl-3-methylimida-zolium 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 AlCl3 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.更多还原