Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its halogen substitution pattern allows for selective cross-coupling reactions, enabling the construction of complex quinazoline-based molecules with biological activity. Commonly employed in research settings to design potent and selective inhibitors targeting EGFR, VEGFR, and other tyrosine kinases involved in tumor growth and angiogenesis. Also utilized in agrochemical research for developing novel pesticides due to its electron-deficient aromatic core, which enhances binding to biological targets.