Comparing Catalytic Activity of MgMnO3 and SrMnO3 Nanocatalyst for Synthesis of Polyhydroquinoline and New Derivatives via Hantzsch Reaction

Abstract

Spinel-type oxide MgMnO3 and perovskite-type oxide SrMnO3 have been synthesized by two-step procedures comprising the hydrothermal and solid-state methods. The as-prepared catalysts were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis and the morphologies of the synthesized materials were figured out by field emission scanning electron microscopy. The catalytic performance of synthesized materials were investigated by synthesizing the polyhydroquinolines, which was used Design-Expert software and response surface methodology (central composite design) for optimization of reaction efficiently. The comparison study illustrates that MgMnO3 has better catalytic performance than SrMnO3 and optimized condition for the synthesis of polyhydroquinoline (which is produced by the reaction of ethyl acetoacetate, benzaldehyde, dimedone and ammonium acetate) was found to be 8 mg of MgMnO3 as the catalyst, 33 min for the reaction time and 100 °C for the reaction temperature. This condition was used for the synthesis of other polyhydroquinoline derivatives.