Introduction of Ag/CuO/MCM-48 as an efficient catalyst for the one-pot synthesis of novel pyran-pyrrole hybrids

摘要

Bimetallic silver and copper incorporated mesoporous MCM-48 (Ag/CuO/MCM-48) was synthesized by simple wet-impregnation method. The knowledge about its structural properties was gathered by means of Fourier transform-infrared, energy-dispersive X-ray, X-ray diffraction, field emission-scanning electron microscopy, transmission electron microscopy and Brunauer-Emmett-Teller analyses. The catalytic activity of Ag/CuO/MCM-48 was examined in the one-pot three-component reaction of 3-(1-methyl-1H-pyrrol-2-yl)-3-oxopropanenitrile, malononitrile and various aromatic aldehydes leading to novel pyran-pyrrole hybrid derivatives in reduced reaction times (5-10 min) and excellent yields (88-97%). Application of Ag/CuO/MCM-48 as a potent heterogeneous catalyst with good reusability up to five times, use of ethanol as an eco-compatible medium and chromatography-free work-up are some crucial green aspects of this procedure.