Used as a key intermediate in the synthesis of biologically active quinazoline derivatives, particularly in pharmaceutical research targeting kinase inhibitors. Its iodo functional group allows for facile cross-coupling reactions, enabling the introduction of various substituents to modify potency and selectivity in drug candidates. Commonly employed in the development of anticancer, antiviral, and anti-inflammatory agents due to the quinazoline core’s affinity for enzyme inhibition. Also utilized in labeled compound synthesis for metabolic studies and imaging probes owing to the presence of iodine.