Used as a key intermediate in the synthesis of kinase inhibitors, particularly in the development of anticancer agents. Its structure allows selective modification to target specific protein kinases involved in tumor growth and signal transduction pathways. Commonly employed in medicinal chemistry for optimizing potency and selectivity in drug candidates, especially in treatments for leukemia and solid tumors. Also utilized in research settings to study enzyme inhibition and structure-activity relationships in purine-based analogs.