An efficient and benign protocol is reported for the synthesis of medicinally important pyrazole derivatives, 4-methoxyaniline, and Ullmann-type condensation reaction using magnetically separable and reusable magnetite-supported copper (nanocat-Fe-CuO) nanoparticles under mild conditions. Nanoparticles with average size of 20−30 nm have been synthesized using simple impregnation techniques in aqueous medium from readily available inexpensive starting materials and were recycled six times without loss in catalytic activity.
<P>Background: In recent years, green organic transformation has become a challenge for a
chemist in areas like social sector, health, and environment. Literature survey revealed that a nano
magnetite supported heterogeneous catalysis is an emergent field with huge application in chemical
synthesis.
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Objective: In the present article, the aim was to develop a simple and facile method to carry organic
reaction under benign media. So, the focus was on the synthesis of nano-magnetite supported molybdenum
catalyst and its application in β-enaminones synthesis.
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Methods: Magnetically recyclable heterogeneous ferrite-molybdenum catalyst was prepared by simple
impregnation method. The synthesized nanocatalyst Fe-Mo was well analysed by spectroscopic
techniques like X-ray diffraction analysis, X-ray photoelectron spectroscopy, transmission electron
microscopy, field-emission gun scanning electron microscopy and vibrating-sample magnetometry.
The functionalized nanocatalyst Fe-Mo was employed in the synthesis of β-enaminones under solvent
free condition.
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Results: The competency of synthesized nanocatalyst-Fe-Mo was observed to be good for the synthesis
of β-enaminones derivatives under microwave irradiation and gave excellent yield (86-96%) of
the product. The catalyst was recycled for more than five consecutive runs without significant loss in
its activity.
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Conclusion: In the present research article, synthesis of highly active, magnetically recyclable Fe-
Mo nanocatalyst was obtained from easily available precursor. The MNP was stable under investigated
conditions and effective in β-enaminones synthesis. The simple eco-friendly method, low catalyst
loading, short transformation time, and reusability of the catalyst thoroughly follow the sustainable
protocol.</P>
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