Supported N-propylsulfamic acid on magnetic nanoparticles used as recoverable and recyclable catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones in water

An efficient and eco-friendly method is reported for the synthesis of 2-substituted-2,3-dihydroqui nazolin-4(1H)-ones from direct cyclocondensation of anthranilamide with aldehydes and ketones using N-propylsulfamic acid supported onto magnetic Fe3O4 nanoparticles (MNPs-PSA) as a recoverable and recyclable nanocatalyst in good to excellent yields in water at 70 8C. The catalyst was readily separated using an external magnet and reusable without significant loss of their catalytic efficiency.

Magnetic nanoparticles, N-Propylsulfamic acid, Nanocatalyst, 2,3-Dihydroquinazolin-4(1H)-ones, Cyclocondensation, Anthranilamide