[BzMIm]HSO4 synthesis

Yield:956597-95-8 93%

Reaction Conditions:

with 1-hexene;sulfuric acid;dihydrogen peroxide at 25; for 3 h;

Steps:

Ionic liquids (Table 1, Entries 1-19, 21); General Procedure

General procedure: A mixture of the appropriate imidazolium bromide (0.2 mol) and hex-1-ene (30 mL) was stirred in a flask, and a mixture of the appropriate protonic acid (0.2 mol) and H₂O₂ (0.1 mol) was added dropwise at room temperature (25 °C). After the appropriate time (Table 1), the liquid was placed in a separatory funnel and the oil phase was removed. The aqueous phase was washed with portions of CH₂Cl₂ (50mL) until it was colorless. Residual H₂O in the product was removed by azeotropic distillation with cyclohexane. For [BzMim]PF₆ (Table 1,entry 18), which has low water solubility, post-processing required only distillation and desiccation of the oil phase.

References:

Li, Wenxiu;Dai, Shangwu;Li, Dong;Zhang, Qinqin;Fan, Hongtao;Zhang, Tao;Zhang, Zhigang [Synthesis,2017,vol. 49,# 5,art. no. SS-2016-H0009-OP,p. 1065 - 1072]