Synthesis of Quinazolin-4(3 H)-ones via the Reaction of 2-Halobenzamides with Nitriles.

This paper describes a convenient method to synthesize quinazolin-4(3 H)-ones from simple and readily available 2-halobenzamides and nitriles. The Lewis acid Cu-catalyzed nucleophilic addition of 2-halobenzamide to nitriles followed by SNAr reaction proceeds smoothly in the presence of tBuOK as a base to produce quinazolinone derivatives.