An ecofriendly and reusable catalyst RuO2/MWCNT in the green synthesis of sulfonyl-quinolines

Abstract

A simple and efficient RuO2/MWCNT nanocatalyst has been synthesized and thoroughly characterized by powdered XRD, SEM, SEM-EDX, TEM, and N2 adsorption analysis. The catalytic activity of RuO2/MWCNT nanomaterial was investigated in the effective green synthesis of sulfonyl-quinoline derivatives (5a–j) in higher yields applying a one-pot four-component reactions of substituted aldehydes, dimedone, phenylsulfonyl acetonitrile and NH4OAc in ethanol. The conversion was high under optimal conditions. The catalyst material could be separated easily from the reaction mixture and recyclable eight times via simple filtration without considerable reduction of its catalytic efficiency. Simple handling, eco-friendly, inexpensive, excellent yields (91–98%), minimum reaction time (≤15 min), use of green solvent and easy work-up are the features of this methodology.