Sulfonated Ethylenediamine Immobilized on Magnetic Nanoparticles as a Novel Heterogeneous Catalyst for the Green Preparation of 2-Arylbenzimidazoles

Document Type : Full Paper

Authors

1 Department of Chemistry, Payame Noor University (PNU), P. O. Box: 19395-3697, Tehran, Iran. Research Center of Environmental Chemistry, Payame Noor University, Ardakan, Yazd, Iran

2 Department of Chemistry, Payame Noor University (PNU), P. O. Box: 19395-3697, Tehran, Iran

10.22036/org.chem.2023.316322.1267

Abstract

Sulfonated ethylenediamine supported on silica-coated magnetite nanoparticles, Fe3O4@SiO2@(CH2)3-en-SO3H/H2SO4 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.

Keywords

Organic Chemistry Research
Volume 7, Issue 2
December 2021
Pages 157-165

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