Highly stable, super-paramagnetic nanoparticle supported l-proline catalyst (nano-FDP) which shows extra-ordinary catalytic activity was synthesized for the first time from economical and easily available starting materials. Characterization of the synthesized catalyst was done by FT-IR, EDX, SEM and TEM analysis. Application of this for synthesis of pyran derivatives under ultrasonication at room temperature showed excellent results. Use of water as a solvent which is nature's own reaction medium, shorter reaction time, high yield of the desired product, recovery of the catalyst by external magnetic field, and its reusability in further runsare the added advantages of this methodology. [GRAPHICS] .