Used as a key intermediate in the synthesis of selective kinase inhibitors, particularly in the development of anticancer agents targeting EGFR (epidermal growth factor receptor) and HER2 pathways. Its structure enables strong binding affinity and selectivity, making it valuable in pharmaceutical research for treating non-small cell lung cancer and other solid tumors. Also employed in structure-activity relationship (SAR) studies to optimize potency, solubility, and metabolic stability in drug candidates.