中文摘要：

以1-乙基咪唑为原料,合成了布朗斯特酸性离子液体——1-乙基-3-丁基磺酸咪唑对甲苯磺酸盐（IL1）,并将其用于催化芳香醛与5,5-二甲基-1,3-环己二酮或1,3-环己二酮在无溶剂条件下合成了系列氧杂蒽类化合物,其结构经1H NMR,13C NMR和ESI-MS表征。研究结果表明：当IL1用量为5 mol%,于80℃反应40 min,收率78%-95%;IL1循环使用3次,收率86%-89%,催化活性无明显变化。

英文摘要：

Brφnsted acidic ionic liquid, 1 -ethyl-3- （ 4-sulfobutyl ） -1H-imidazol-3-ium p-toluenesulfonate （IL1）, was prepared using 1-ethylimidazole as raw material. A series of xanthenes were synthesized by condensation reaction of aromatic aldehydes with 5,5-dimethyl-1,3-cyclohexanedione or 1,3-cyclohexanedione catalyzed by IL1 under solvent-free conditions. The structures were characterized by ^1H NMR, ^13 C NMR and ESI-MS. The results indicated that 5 mol% IL1 as catalyst, reaction at 80℃ for 40 min, the yields were 78% - 95%. The catalytic activity of IL1 keep stable with the yields of 86% - 89% after recycling of three times.