Synthesis and Application of Silica Phenyl Sulfonic Acid as a Solid Acid Heterogeneous Catalyst for One-Pot Synthesis of 2-Aryl-1-arylmethyl-1H-1,3-benzimidazoles and Bis(indolyl)methanes in Water

[摘要]：Silica phenyl sulfonic acid (SPSA) was prepared and effectively used in the one-pot synthesis of 2-aryl-1-arylmethyl-1H-1,3-benzimidazoles from o-phenylenediamine with aldehydes in water in the presence of tetrabutyl ammonium bromide with good to high yield. Also, SPSA was used as a catalyst for the synthesis of bis(indolyl)methanes in water.

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