Used as a key intermediate in the synthesis of kinase inhibitors, particularly in the development of anticancer agents. Its structure allows for selective binding to ATP sites in kinases, making it valuable in targeting signaling pathways involved in tumor growth. Commonly utilized in medicinal chemistry for structure-activity relationship (SAR) studies to optimize potency and selectivity. Also employed in radiolabeled forms for imaging applications due to the presence of iodine, enabling use in SPECT or radiotherapy research.