Silica supported lanthanum trifluoroacetate and trichloroacetate as green Lewis acid catalysts were developed by a novel, simple, cheap, and environment friendly method and utilized them in the synthesis of arylimidazole derivatives via one pot solvent-free approach.

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We synthesized a series of ZSM-11 zeolite catalysts, investigating the effect of varying the reaction time interval from 18 to 48 h. The ZSM-11 zeolite (48 h) has higher catalytic activity for the synthesis of 1,2,4,5-tetrasubstituted imidazoles.

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