Pd(ii)-Catalyzed [4 + 1 + 1] cycloaddition of simple o-aminobenzoic acids, CO and amines: direct and versatile synthesis of diverse N-substituted quinazoline-2,4(1H,3H)-diones

Pd(ii)-Catalyzed modular synthesis of diverse quinazoline-2,4-(1H,3H)-diones through one-pot cascade cycloaddition of o-aminobenzoic acids with CO and amines can proceed efficiently under mild conditions in moderate to excellent yields.