Multicomponent Strategy for the Synthesis of 2,3‐Dihydro‐4 <i>H</i> ‐Imidazol‐4‐Ones under Catalyst‐ and Additive‐Free Conditions

A catalyst‐ and additive‐free multicomponent reaction is developed for synthesizing substituted 2,3‐dihydro‐4 H ‐imidazol‐4‐ones from readily available benzoylformates, ketones, and ammonium salts. This protocol features dual nitrogen incorporation from ammonium salts and four CN bonds formation in one pot under optimized conditions. It exhibits broad substrate scope and good functionality tolerance, aligning with green chemistry principles.