Abstract
MCM-41-SO3H as an ordered mesoporous silica material in which MCM-41 with covalently anchored sulfonic acid groups located inside the meso channels, was used as an acidic catalyst for the rapid and ‘green’ synthesis of N-aryl-2-amino-1,6-naphthyridine derivatives under solvent-free conditions. This nanocatalyst was characterized by X-ray powder diffraction, Fourier-transfer infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Nitrogen adsorption-desorption analysis and acid-base titration. This novel synthetic method is especially favoured because it provides a synergy of the nanosized MCM-41-SO3H and solvent-free conditions which offers the advantages of high yields, simplicity and easy workup compared to the conventional method reported in the literature. Most significantly, this solid acidic catalyst is found to be very efficient and reusabile for a number of times and showed consistent activity.
Keywords: Nanocatalyst, MCM-41-SO3H, N-aryl-2-amino-1, 6-naphthyridine, Solvent free conditions.
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