Layered double hydroxides@poly(p-phenylenediamine)@Cu as a novel catalyst for the synthesis of pyrrole derivatives: preparation and characterization

In this research, the synthesis route of ZnCr-layered double hydroxides functionalized with poly(p-phenylenediamine) and Cu(II) was described. LDHs@PpPDA@Cu was synthesized as a novel, green, and recyclable catalyst and characterized by various techniques including Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetry analysis, X-ray diffraction, and energy dispersive X-ray analysis. The catalytic activity of the LDHs@PpPDA@Cu was investigated in the synthesis of pyrrole derivatives via one-pot four-component coupling of amine, aldehyde, nitromethane and acetylacetone. The results of analyses demonstrated that the reactions proceeded to completion which has led to the successful synthesis of high purity compounds. [GRAPHICS] .