An Eco‐Friendly and Efficient Approach for the Synthesis of Tetrazoles via Fe ₃ O ₄ /HT‐GLYMO‐TA as a New Recoverable Heterogeneous Nanostructured Catalyst

Tannic acid immobilized on functionalized magnetic hydrotalcite (Fe 3 O 4 /HT‐GLYMO‐TA) was synthesized as a durable, environmentally‐friendly and magnetic nanostructured catalyst for the synthesis of 5‐ and 1‐substituted‐1 H ‐tetrazoles. The nanocatalyst was characterized by several methods, Fourier transform infrared (FT‐IR), X‐ray diffraction (XRD) analysis, transmission electron microscopy (TEM), field emission scanning electron microscopy (FE‐SEM), energy‐dispersive X‐ray spectroscopy (EDS), EDS‐map, thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM) and CHNS analysis. The results displayed that the superparamagnetic catalyst with a mean particle size of approximately 23–27 nm has a plate‐like shape. The catalytic activity of this new nanostructured catalyst resulted in the preparation of tetrazoles with high yields. Additionally, this novel procedure offers a plethora of benefits including short reaction times, the simplicity of operation, the ease of purification procedure and the reusability of nanocatalyst for at least eight cycles.