Magnetized melamine‐modified polyacrylonitrile (PAN@melamine/Fe₃O₄) organometallic nanomaterial: Preparation, characterization, and application as a multifunctional catalyst in the synthesis of bioactive dihydropyrano [2,3‐c]pyrazole and 2‐amino‐3‐cyano 4H‐pyran derivatives

An efficient magnetic polymer‐based nanomaterial was prepared in three main steps including synthesis of polyacrylonitrile (PAN), modification of PAN with melamine, and magnetization of the PAN@melamine compound by in situ construction of Fe 3 O 4 MNPs. The novel PAN@melamine/Fe 3 O 4 organometallic nanocomposite was well characterized by various techniques such as Fourier transform infrared (FT‐IR) spectroscopy, energy dispersive X‐ray (EDX)...