Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective functionalization, making it valuable in constructing complex heterocyclic systems found in bioactive molecules. Commonly employed in cross-coupling reactions such as Suzuki or Heck reactions to introduce aryl or vinyl groups, enabling the exploration of structure-activity relationships in drug discovery programs. Also utilized in the preparation of potent antiviral agents and targeted therapies due to its ability to mimic purine scaffolds in nucleoside analogs.