Preparation of Heterogeneous Pd-Containing Catalysts Anchored on a Hybrid Organic-Inorganic Surface of SBA-15 and its Application in Green Synthesis of Pyridopyrimidines

A new functionalized SBA-15 mesoporous silica has been prepared as a catalyst and characterized by different analytical techniques to determine the quality of the catalyst, including X-ray diffraction spectroscopy (XRD), Temperature Programmed Desorption (TPD), N 2 adsorption analysis, Field emission scanning electron microscopy (FE-SEM), X-Ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), Energy-dispersive X-ray spectroscopy (EDX), and Thermogravimetric, Differential thermal analysis (TGA-DTA). The efficiency of the catalyst has been evaluated by synthesizing a wide range of polyfunctionalized pyrido[2,3-d] pyrimidines. This method provides several advantages containing mild reaction conditions, excellent yields in short times, the reusability of the catalyst and low catalyst loading.