An efficient method for the synthesis of a series of 2,3‐disubstituted‐2,3‐dihydroquinazolin‐4(1H)‐ones is described via one‐pot condensation reaction of isatoic anhydride, aryl aldehydes, and primary amines using a Brønsted acidic ionic liquid, [Hmim][NO3], as a catalyst and medium. The present protocol enjoys convenient reaction and simple work‐up, greenness, short reaction times, and reusable catalyst
The reaction of isatoic anhydride, amines, and aldehydes in the presence of a microporous zeolite gave 2,3-dihydroquinazolin-4(1H)-one derivatives with good to excellent yield. The yield depends on the structure of the aldehyde and/or amine compound.