A Facile, One-Pot, Green Synthesis of Polysubstituted 4H-Pyrans via Piperidine-Catalyzed Three-Component Condensation in Aqueous Medium

An efficient, one-pot method was described for the synthesis of various polysubstituted 4H-pyrans via piperidine catalyzed three-component condensation in aqueous medium. The reaction could be promoted effectively by adding sodium dodecyl sulfate to aqueous medium.