Abstract
Polyethylene glycol-6000 supported copper-molybdenum nanoparticles (CuO–MoO3@PEG) has been synthesized as a highly efficient, novel and recyclable heterogeneous catalyst by simple impregnation method. The catalyst was characterized by FTIR, XRD, SEM, EDX, elemental mapping, TEM, TGA, EPR, ICP-AES, UV–visible DRS and XPS analyses. The catalyst was successfully applied for the enamination of pyrimidine dione and dimedone (1,3- dicarbonyl compounds). The catalyst was found to be efficient up to five cycles with minor loss in catalytic activity. The recovered catalyst (5th run) retained its structure integrity which was confirmed by FTIR, XRD, SEM, TEM, TGA, and ICP-AES analyses. The products (β-enaminones) were obtained in excellent yield (92%) and short reaction time period (30–35 min).
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