Magnetic core–shell titanium dioxide nanoparticles as an efficient catalyst for domino Knoevenagel–Michael-cyclocondensation reaction of malononitrile, various aldehydes and dimedone

Fe₃O₄@SiO₂@TiO₂efficiently catalysed the preparation of tetrahydrobenzo[<italic>b</italic>]pyrans by a one-pot three component reaction of aldehydes, dimedone and malononitrile at 100 °C under solvent-free conditions.

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