In this work, a green and efficient procedure is reported for the preparation of N,N'-diarylformamidines, benzoxazoles, benzothiazoles, and benzimidazoles using nanoporous TiO₂ containing an ionic liquid bridge. This reagent is prepared via the modification of nanoporous TiO₂ with bis-3-(trimethoxysilylpropyl)-ammonium hydrogen sulfate (TiO₂-[bip]-NH₂⁺ HSO₄⁻). The procedure gave the products in excellent yields in very short reaction times under solvent-free conditions. The reusability of the catalyst is the other important feature of the reported method.

中文翻译：

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含有离子液体桥的 纳米多孔TiO ₂，可作为一种有效且可重复使用的催化剂，用于合成N，N'-二芳基甲am，苯并恶唑，苯并噻唑和苯并咪唑†

在这项工作中，报道了使用含有离子液体桥的纳米多孔TiO ₂制备N，N'-二芳基甲am，苯并恶唑，苯并噻唑和苯并咪唑的绿色高效方法。这种试剂制备通过纳米多孔TiO 2的变形例₂与双-3-（三甲氧基甲硅烷） -铵硫酸氢（的TiO ₂ - [BIP] -NH ₂ ⁺ HSO ₄ ^- ）。该方法在无溶剂条件下以非常短的反应时间以优异的收率得到了产物。催化剂的可重复使用性是所报道方法的另一个重要特征。