Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of antiviral and anticancer agents. Its structure supports the formation of biologically active molecules by serving as a scaffold in heterocyclic chemistry. Commonly employed in research settings to design new quinazoline-based drugs that target enzyme inhibition, especially in kinase and topoisomerase pathways. Also utilized in the preparation of derivatives for screening in medicinal chemistry due to its favorable reactivity and stability.