Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical research targeting kinase inhibitors. Its structure allows for selective substitution at the 7-position, making it valuable in developing antitumor, antiviral, and anti-inflammatory agents. Commonly employed in cross-coupling reactions such as Suzuki or Heck reactions to build complex heterocyclic systems for drug discovery. Also utilized in the preparation of thienopyrimidine-based derivatives that show promise in central nervous system therapies and as modulators in cellular signaling pathways.