IRMOF-3 Functionalized GO/CuFe2O4: A New and Recyclable Catalyst for the Synthesis of Dihydropyrano[2,3-c]Pyrazoles under Ultrasound Irradiations

In the present study, we reported a facile and cost-effective method for synthesizing magnetic copper ferrite nanoparticles supported on IRMOF-3/GO [IRMOF-3/GO/CuFe2O4]. The prepared IRMOF-3/GO/CuFe2O4 was completely characterized by various spectroscopic techniques such as Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (IR), thermogravimetric (TGA), energy-dispersive X-ray spectroscopy, and elemental meapping. The synthesized nanocatalyst demonstrated high catalytic activity in the synthesis of dihydropyrano[2,3-c]pyrazoles via a one-pot reaction of hydrazine hydrate, acetylene ester, aryl aldehydes, and malononitrile exposed to ultrasound irradiations. In comparison to formerly reported approaches, this protocol has various advantages including wide substrate compatibility, short reaction times, excellent yields, little catalyst loading, good reusability, and high efficiency. The catalyst was separated by simple filtration and after several rounds of reuse and recovery, the amount of activity in this catalytic system remained nearly constant.(c) 2022 Elsevier B.V. All rights reserved.