Metal‐Free Synthesis of 2‐Aryl Quinazolines via Tandem C−H/N−H Bond Functionalization

C−N bond formation is crucial for the preparation of synthetic organic nitrogen‐containing heterocyclic compounds. This work provides a facile and highly efficient strategy (ca. ∼92 %) for the synthesis of quinazoline compounds, which involves tandem C−H/N−H bond functionalization using metal‐free conditions without the need for an external oxidant. Meanwhile, the reaction system exhibits good functional group tolerance and a wide substrate scope. Furthermore, our corresponding isotope tracking experiments have shown that dimethyl sulfoxide acts as a carbon source. Finally, this work affords a new strategy toward the further design and synthesis of heteroaromatic rings.