Synthesis of Benzoxazole and Benzimidazole Derivatives via Ligand‐Free Copper(I)‐Catalyzed Cross‐Coupling Reaction of o‐Halophenols or o‐Haloanilines with Carbodiimides

A novel and efficient synthesis of benzoxazole and benzimidazole derivatives via a ligand‐free, copper(I)‐catalyzed, one‐pot cascade process has been developed. A variety of carbodiimides coupled with o‐halophenols or o‐haloanilines to give the products in moderate to excellent yields under the mild conditions.