fe3o4@saponin/cd: a novel magnetic nano-catalyst for the synthesis of β-aminoketone derivatives

A novel recyclable magnetic core–shell nanoparticles fe3o4@saponin/cd was synthesized by the combination of nano-fe3o4@saponin with cadmium acetate. the structure, magnetic features, and morphology of magnetic nanoparticles (mnps) fe3o4@saponin/cd were studied totally via different experiments, such as fourier transform infrared (ft-ir) spectroscopy, energy-dispersive x-ray spectroscopy (eds), thermogravimetric analysis (tga), x-ray diffraction (xrd), vibrating sample magnetometer (vsm), scanning electron microscopy (sem), inductively coupled plasma (icp), high-resolution transmission electron microscopy (hr-tem), and brunauer–emmett–teller (bet). it was found that the catalyst was active for the synthesis of β-aminoketone derivatives via one-pot three-component mannich-type reactions of ketones, aromatic aldehydes, aromatic amines under eco-friendly solvent, at room temperature. furthermore, this catalyst can be easily recovered magnetically and can be reused for other runs without any reduction in the activity.