Sulfonated Ethylenediamine Immobilized on Magnetic Nanoparticles as a Novel Heterogeneous Catalyst for the Green Preparation of ۲-Arylbenzimidazoles

Sulfonated ethylenediamine supported on silica-coated magnetite nanoparticles, Fe۳O۴@SiO۲@(CH۲)۳-en-SO۳H/H۲SO۴ as a new efficient solid acid catalyst was synthesized and fully characterized using various techniques such as FT-IR, FESEM, EDS, TEM, TGA, XRD and VSM. The resulting nanostructure catalyst was applied in the green synthesis of benzimidazole derivatives by the cyclocondensation reaction of o-phenylendiamine with aromatic aldehydes in refluxed ethanol and under solvent-free conditions. The nanocatalyst can be recovered magnetically and can be reused several times without a considerable loss in its catalytic activity.

کلیدواژه ها:

Magnetic solid acid catalyst ، Fe۳O۴@SiO۲@(CH۲)۳-en-SO۳H/H۲SO۴ ، Reusability ، benzimidazole derivatives ، Cyclocondensation