One-pot synthesis of chromenes in the presence of magnetic nanocomposite based on NH2-UiO-66(Zr), graphene oxide and Fe3O4

• Published in: Journal of molecular structure 2022-09, Vol.1263, p.133022, Article 133022
• Main Authors: Abdollahi-Basir, Mohammad Hossein, Shirini, Farhad, Tajik, Hassan, Ghasemzadeh, Mohammad Ali
• Format: Article
• Language: English
• Subjects: Fe3O4; Graphene oxide; Magnetic nanocomposite; Synthesis of chromenes; UiO-66-NH2
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2022.133022

•GO/Fe3O4/UiO‑66-NH2 is introduced as a green, strong and efficient catalyst.•GO/Fe3O4/UiO‑66-NH2 can be easily recycled with a slightly decrease in its activity.•Synthesis of chromenes in high yields and short reaction times.•GO/Fe3O4/UiO‑66-NH2 was characterized by EDX, SEM, BET, XRD, TGA and FT-IR analysis. In this research, GO/Fe3O4/UiO‑66-NH2, a new magnetically recoverable heterogeneous catalyst, was prepared and characterized using various spectroscopic techniques and elemental analysis methods. The promoting ability of GO/Fe3O4/UiO‑66-NH2 was studied in the synthesis of chromenes via one-pot three-component condensation of 4‐hydroxycoumarin, 2‐hydroxynaphthalene‐1,4‐dione and aromatic aldehydes at 110 °C under solvent-free conditions. This new protocol is included some important features such as lower loading of the catalyst, excellent yields (88%–98%), short reaction times (5–10 min), easy work-up procedure, and easy recovery using a simple magnet. The catalyst was characterized by SEM, XRD, EDX, BET, TGA and FT-IR analysis. [Display omitted]