Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical research targeting kinase inhibitors. Its structure allows for selective functionalization, making it valuable in developing antitumor and antiviral agents. The silyl protecting group enhances stability and solubility during reaction sequences, while the halogen atoms enable cross-coupling reactions such as Suzuki or Stille couplings. Commonly employed in medicinal chemistry for constructing pyrrolopyrimidine scaffolds found in ATP-competitive inhibitors.