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Silver Phosphotungstate: A Novel and Recyclable Heteropoly Acid for Friedländer Quinoline Synthesis
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2004
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Chemical EngineeringFriedländer Quinoline SynthesisEngineeringO-aminoaryl KetonesSilver PhosphotungstateCatalytic SynthesisHeterogeneous CatalysisRecyclable Heteropoly AcidOrganic ChemistryCatalysisStereoselective SynthesisChemistryα-Methylene KetonesSmooth CondensationAsymmetric CatalysisSynthetic ChemistryBiomolecular Engineering
o-Aminoaryl ketones undergo smooth condensation with α-methylene ketones on the surface of silver heteropoly acid (Ag3PW12O40) under mild reaction conditions to afford the corresponding polysubstituted quinolines in excellent yields with high selectivity. The catalyst can be recovered by simple filtration and can be recycled in subsequent reactions.