SCMNPs@Urea/Py-CuCl2: a recyclable catalyst for the synthesis of pyrano[2,3-d]pyrimidinone and pyrano[2,3-d] pyrimidine-2,4,7-trione derivatives

摘要

An efficient, simple, and mild strategy for the one-pot multicomponent synthesis of pyrano[2,3-d]pyrimidinone and pyrano[2,3-d]pyrimidine-2,4,7-trione derivatives is described using SCMNPs@Urea/Py-CuCl2 nanoparticles as a reusable heterogeneous magnetic nanocatalyst. The catalyst was characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The SCMNPs@Urea/Py-CuCl2 can be easily collected from the reaction solution by magnetic decantation using a permanent magnetic field and reused in six runs without significant decrease in catalytic activity.