Used as a key intermediate in the synthesis of quinazoline-based pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows selective modification at the 4 and 6 positions, enabling the introduction of amino or other functional groups to enhance biological activity. Commonly employed in research for designing targeted therapies, including EGFR and VEGFR inhibitors. Also utilized in agrochemical research for developing herbicides and pesticides due to its stable heterocyclic core and reactivity profile.