Abstract

The present work reports a simple procedure for the preparation of cadmium pyrophosphate (Cd₂P₂O₇) from the modification of mono-ammonium phosphate (MAP) fertilizer by cadmium chloride (CdCl₂). The obtained support has been characterized by microscopic and spectroscopic methods, namely X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and infrared spectroscopy (IR). The catalytic activity of Cd₂P₂O₇ has been evaluated by its application for the first time as a heterogeneous catalyst in the 2,3-dihydroquinazolin-4(1H)-one derivatives synthesis. This synthesis has been realized through the condensation of anthranilamide with different aromatic aldehydes. The optimum reaction conditions have been determined by studying the effect of the catalysts amount, the solvent nature, and the temperature. The results show that Cd₂P₂O₇ possesses a high catalytic efficiency because of the excellent yields and the short reaction times obtained for the studied reactions. Furthermore, it presents a remarkable capacity for recovery and reusability, and therefore its application contributes to the green chemistry development.

摘要

本工作报告了一种通过氯化镉 (CdCl ₂ )改性磷酸一铵 (MAP) 肥料制备焦磷酸镉 (Cd ₂ P ₂ O ₇ ) 的简单程序。所获得的载体已通过显微和光谱方法表征，即 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、能量色散 X 射线分析 (EDX) 和红外光谱 (IR)。_{Cd 2} P ₂ O ₇的催化活性已经通过其首次作为非均相催化剂在 2,3-二氢喹唑啉-4(1H)-one 衍生物合成中的应用进行了评估。该合成是通过邻氨基苯甲酰胺与不同芳香醛的缩合实现的。通过研究催化剂用量、溶剂性质和温度的影响，确定了最佳反应条件。结果表明，Cd ₂ P ₂ O ₇具有较高的催化效率，因为所研究的反应获得了优异的收率和较短的反应时间。此外，它具有显着的回收和可重复使用能力，因此其应用有助于绿色化学的发展。