Used as an intermediate in the synthesis of pharmacologically active compounds, particularly in the development of kinase inhibitors and anticancer agents. Exhibits utility in medicinal chemistry for modifying quinazoline-based structures to enhance biological activity, selectivity, and metabolic stability. Commonly employed in research settings to explore structure-activity relationships in central nervous system drugs and anti-inflammatory agents. Also serves as a building block in the preparation of fluorescent probes due to its favorable photophysical properties.