Synthesis and catalytic application of a curcumin‐based bio‐MOF in one‐pot preparation of tetrahydroquinazolinone derivatives via Biginelli reaction

Abstract

AbstractIn this work, a new curcumin‐based bidentate linker ligand, CurOAc, including two –COO−moieties at positions‐4 in phenyl rings, was designed, synthesized, and characterized. Accordingly, its corresponding zinc‐organic framework, Zn‐CurOAc, as a bio‐metal–organic framework (MOF) has been prepared and evaluated in the one‐pot three‐component Biginelli condensation reaction of substituted aromatic aldehydes, urea, and dimedone in ethanol. Zn‐CurOAc shows an excellent catalytic performance for the synthesis of tetrahydroquinazolinone derivatives at room temperature with high turnover frequency (TOF) values (5.43–10.86 h−1). The chemical structure of Zn‐CurOAc was characterized by fourier‐transform infrared spectroscopy (FT‐IR), X‐ray diffraction (XRD), inductively coupled plasma optical emission spectrometry (ICP‐OES), field emission‐scanning electron microscopy (FE‐SEM), transmission electron microscope (TEM), energy dispersive X‐ray (EDX), differential thermal analysis (DTA), and thermogravimetric analysis (TGA) techniques. This new catalytic approach was proceeded by the excellent isolated yields, short reaction times, and easy workup.