One-pot three-component synthesis of tetrahydrobenzo[b]pyrans in the presence of Ni0.5Cu0.5Fe2O4 magnetic nanoparticles under microwave irradiation in solvent-free conditions

Authors

• Hamideh Ahankar * ¹
• Saeid Taghavi Fardood ²
• Ali Ramazani ^{3, 4}

1. Department of Chemistry, Abhar Branch, Islamic Azad University, P. O. Box 22, Abhar, Iran.
2. Department of Chemistry, University of Zanjan, P O Box 45195-313, Zanjan, Iran.
3. Department of Biotechnology, Research Institute of Modern Biological Techniques (RIMBT), University of Zanjan, Zanjan 45371-38791, Iran
4. Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran

Abstract

Ni_0.5Cu_0.5Fe₂O₄ magnetic nanoparticles using Arabic gel (AG) as a reducing and stabilizing agent was prepared by the sol-method. The catalyst identification was performed using Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). The magnetic analysis showed that the Ni_0.5Cu_0.5Fe₂O₄ had a ferromagnetic behavior with a saturation magnetization of 31.22 emu/g at room temperature. Then, Ni_0.5Cu_0.5Fe₂O₄ magnetic nanoparticles were applied as a green, convenient, effective and reusable catalyst for the one-pot three-component synthesis of tetrahydrobenzo[b]pyrans in good to excellent yields. It should be noted, the nanocatalyst is separated by a magnet was used several times and it was as efficient as ever.

Keywords

• Solvent-free
• Magnetic nanoparticles
• Ferrite
• Tetrahydrobrnzo[b]pyran drivetives
• Microwave irradiation