Cu nanoparticles immobilized on modified magnetic zeolite for the synthesis of 1,2,3-triazoles under ultrasonic conditions

Magnetically recoverable copper nanoparticle-loaded natural zeolite (CuNPs/MZN) as an efficient catalyst was synthesized. The Fe3O4 magnetic nanoparticles were immobilized into the pores of natural clinoptilolite zeolite, which were modified with epichlorohydrine and ethylenediamine species and then CuNPs were decorated on the surface of functionalized zeolite (CuNPs/MZN). The catalysts were successfully characterized by Fourier transform-infrared, CHN, thermogravimetric analysis, inductively coupled plasma, X-ray diffraction, scanning electron microscopy and transmission electron microscopy techniques. The 1,2,3-triazoles were readily synthesized through using the catalyst in high yields and short reaction times under ultrasonic conditions via CuAAC reactions of aryl azides and terminal alkynes. The CuNPs/MZN was easily separated from the reaction mixture by an external magnet and reused several times successfully. The catalyst could be used for the synthesis of various organic compounds.