Friedel - Crafts alkylation of anthracene with 2 - chloropropane catalyzed by [ Bmim ]Cl-AlCl3 ionic liquid
1. School of Material Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Chemistry and Chemi- cal Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China）
Abstract：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.
2009, Vol. 30 
