Authors | Ali Allahresani |
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Journal | Transition Metal Chemistry |
Page number | 269-280 |
Serial number | 48 |
IF | 1.166 |
Paper Type | Full Paper |
Published At | 2023 |
Journal Grade | ISI |
Journal Type | Typographic |
Journal Country | Iran, Islamic Republic Of |
Journal Index | JCR،Scopus |
Abstract
The preparation and characterization of a new unsymmetrical ligand on Fe3O4@ SiO2 with its cobalt complex including an ionic liquid (ILs) group by 1H-NMR, 13C-NMR, FTIR, SEM, EDX, TGA, XRD, and VSM. The catalyst was used in the reaction to prepare chromene compounds from alcohol. Catalyst amount, temperature, solvent, and solvent amount were investigated as factors affecting the reaction. For the synthesis of chromene derivatives at optimum conditions, the alcohol derivatives were first oxidized by the catalyst, followed by malononitrile and diketone additions to the reaction vessel. Recovery and reusability of the catalyst were investigated, which showed excellent results. The presence of ionic liquid groups increased the solubility of the heterogeneous catalyst in green solvents, which increased the efficiency and reduced the reaction time.
tags: pyridine Schiff‑base, chromenes derivatives, benzylic alcohol, recyclable green catalyst