Premium
Green synthesis of the 1‐substituted 1H‐1, 2, 3, 4‐tetrazoles over bifunctional catalyst based on copper intercalated into Mg/Al hydrotalcite modified magnetite nanoparticles
Author(s) -
Salimi Mehri,
Zamanpour Azadeh
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5682
Subject(s) - thermogravimetric analysis , catalysis , chemistry , hydrotalcite , fourier transform infrared spectroscopy , copper , inductively coupled plasma atomic emission spectroscopy , heterogeneous catalysis , inductively coupled plasma , nuclear chemistry , triethyl orthoformate , scanning electron microscope , thermal stability , inorganic chemistry , chemical engineering , materials science , organic chemistry , engineering , physics , plasma , quantum mechanics , composite material
An effective one‐pot, convenient process for the synthesis of 1‐ substituted 1H‐tetrazoles from triethyl orthoformate, amines, and sodium azide is described using copper (II) doped and immobilized on functionalized magnetic hydrotalcite (Fe 3 O 4 /HT‐NH 2 Cu II ) as a novel recyclable catalyst. The application of this catalyst allows the synthesis of a variety of tetrazoles in good to excellent yields in water. The new catalyst was characterized using Fourier transform infrared (FT‐IR) spectroscopy, X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX), thermogravimetric analysis (TGA), vibration sample magnetometry (VSM) and inductively coupled plasma analysis (ICP‐OES). This new procedure offers several advantages such as short operational simplicity, practicability, and applicability to various substrates and the absence of any tedious workup or purification. The loading amount of Cu II (doped and immobilized) on functionalized magnetic hydrotalcite was indicated to be 4.66 mmol g −1 , obtained from the ICP‐OES analysis. Also, the excellent catalytic performance, thermal stability, and separation of the catalyst make it an excellent heterogeneous system and a useful alternative to other heterogeneous catalysts. Also, the catalyst could be magnetically separated and reused six times without significant loss of catalytic activity.