Abstract
Magnetically recoverable polysaccharide-based metallic nanoparticles Carrageenan moss/Fe3O4 (Fe3O4@CM) was tested for the synthesis of Pyrimidinone derivatives via Biginelli reaction under reflux conditions in Water. Interestingly, Fe3O4@CM prepared from unmodified Irish moss showed remarkable catalytic activity and recyclability. Low catalyst loading, simple reaction procedure, and using a green catalyst from a natural source are the important merits of this protocol.
Highlights
The environmental factor is the basis for new industrial processes
The synthesized magnetite nanoparticles were characterized by various techniques, such as FT-IR spectroscopy, scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), Transition electron microscope (TEM), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM) analysis, and Brunauer–Emmett–Teller (BET) surface area analysis
The specific surface area, total pore volume (TOPV) and average pore diameter were obtained by N 2 adsorption isotherms calculated by BET and BJH methods and found to be 1.2209 m2/g, 0.004168 cm3/g, and 54.1501 nm (Fig. 3). N2 sorption isotherms of the sample resembled Type IV isotherms, indicating the presence of mesopores [13]
Summary
The environmental factor is the basis for new industrial processes. It covers the atom economy, and the solvent economy and the energy consumption, as well as reducing the costs and chemical risks. We decided to evaluate the catalytic activity of natural marine-derived polymer carrageenan and magnetically Fe3O4 nanoparticles, F e3O4@ CM (Fig. 1b) as a novel nano-biocatalyst in synthesis of some valuable heterocyclic compounds.
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