Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in medicinal chemistry for creating analogs with biological activity, especially in targeting tyrosine kinase and EGFR pathways. Its structure allows for selective modifications, making it valuable in drug discovery programs focused on antitumor and anti-inflammatory agents. Also employed in research settings to explore new quinazoline-based therapeutics with improved potency and selectivity.