Abstract
Functionalized SBA -15 (Immobilization of Pd on the modified SBA -15) has been applied as an efficient catalyst for the preparation of indenopyrazolones by multi-component reactions of phenylhydrazine, aromatic aldehydes and indan-1,2,3- trione at room temperature in acetonitrile. The catalyst has been characterized by X-ray diffraction spectroscopy ( XRD ), Field emission scanning electron microscopy ( FE - SEM ), Transmission electron microscopy ( TEM ), X-Ray photoelectron spectroscopy ( XPS ), Energy-dispersive X - ray spectroscopy ( EDX ), Fourier-transform infrared spectroscopy ( FT-IR ), N2 adsorption analysis, Temperature Programmed Desorption ( TPD ), and Differential thermal analysis ( TGA - DTA ). The advantages of this method include the reusability of the catalyst, low catalyst loading, excellent yields in short reaction times and easy separation of products. Meanwhile, this recoverable catalyst will provide a regular platform for heterogeneous catalysis, green chemistry, and environmentally benign protocols in the near future.
Published Version
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