Used primarily as an intermediate in the synthesis of biologically active compounds, particularly in the development of kinase inhibitors for cancer therapy. Its structure allows selective modification to produce targeted pharmaceuticals, especially in the design of tyrosine kinase and cyclin-dependent kinase inhibitors. Commonly employed in medicinal chemistry research for constructing purine analogs with antitumor and antiviral properties. Also utilized in cross-coupling reactions due to the presence of halogen atoms, enabling the formation of carbon-carbon and carbon-heteroatom bonds in drug discovery pipelines.