Preparation and characterization of Fe3O4@SiO2/APTPOSS core–shell composite nanomagnetics and it is application in the synthesis of 2-amino-4H-chromene via multicomponent reactions at room temperature

Octakis[3-(3-aminopropyltriethoxysilane)propyl] octasilsesquioxane (APTPOSS) as a polyhedral oligomericsilsesquioxanes derivative was prepared and used as a pioneer reagent to obtain novel core/shell composite using magnetic iron oxide nanoparticles as the core and the inorganic-organic hybrid polyhedral oligomericsilsesquioxanes as the shell. Fe3O4@SiO2/APTPOSS were confirmed by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), x-ray diffraction (XRD). The inorganic-organic hybrid polyhedral oligomericsilsesquioxanes magnetic nanoparticles used as an efficient new heterogeneous catalyst for the one-pot three-component synthesis of 2-amino-4H-chromene via multicomponent reactions at room temperature . Moreover, these nanoparticles could be easily separated by using an external magnet device and then reused several times without significant loss of its catalytic activity.

Keywords:

Fe3O4 MNPs , Multicomponent reactions , POSS , Chromene