An efficient tetra-n-butyl ammonium peroxydisulphate (TBA)₂S₂O₈ catalyzed a direct one-pot synthesis of fully substituted pyrazoles in excellent yields with high regioselectivity has been described via a three-component cyclocondensation of aldehydes, aryl hydrazines with β-diketones or β-keto esters under solvent-free conditions. The structure of the target compound 4 m was confirmed by X-ray diffraction.

中文翻译：

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一种高效的 (TBA)2S2O8 催化区域选择性无溶剂一锅法合成全取代吡唑

已经描述了一种有效的四正丁基过氧化二硫酸铵 (TBA) ₂ S ₂ O ₈通过醛、芳基肼与 β 的三组分环缩合反应，以优异的收率和高区域选择性催化直接一锅法合成完全取代的吡唑。-二酮或β-酮酯在无溶剂条件下。目标化合物4m的结构通过X射线衍射确认。