Cu (II) Complex Stabilized on Fe₃O₄@SiO₂ Nanoparticles: An Effective and Recoverable Catalyst for the Preparation of Chromene Derivatives

Abstract

In the present research, we introduce a simple and efficient method for the synthesis of a new heterogeneous nanocatalyst including [Fe₃O₄@SiO₂-L-Cu(II)] via immobilizing Cu (II) on the surfaces of Fe₃O₄@SiO₂ nanoparticles (NPs). The prepared nanocatalyst was characterized by vibration sample magnetometer (VSM), EDS, X-ray diffraction (XRD), TGA, and Field emission scanning microscopy (FE-SEM) spectroscopic methods. The obtained magnetic nanocomposite showed excellent catalytic activity for the preparation of some chromene derivatives via a three-component reaction of aldehydes, 4‐hydroxycoumarin, and 2‐hydroxynaphthalene‐1,4‐dione. This synthetic procedure provides various benefits, including cost-saving, excellent yields in short reaction times (88–98%), low catalyst loading, and catalyst reusability.

Keywords:

• Chromene derivatives
• heterocyclic compounds
• heterogeneous catalyst
• multi-component reactions
• Fe₃O₄ nanoparticles

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The Research Affairs Office of the Islamic Azad University, Qom Branch, Qom, I. R. Iran [grant number 2019–2898] provided financial support.