Used as a key intermediate in the synthesis of kinase inhibitors, particularly in the development of anticancer agents. Its structure allows for selective modification to target specific protein kinases involved in tumor growth and signal transduction pathways. Commonly employed in medicinal chemistry for constructing potent and selective drug candidates, especially in targeted therapies for leukemia and solid tumors. Also utilized in research settings to develop novel pyrrolopyrimidine-based compounds with improved pharmacokinetic and binding properties.