Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and other biologically active compounds. Its structure supports the formation of complex heterocyclic systems important in drug discovery. Commonly employed in cross-coupling reactions such as Suzuki or Negishi couplings to build larger, functionalized molecules for medicinal chemistry research. Also utilized in the preparation of organic semiconductors and materials for electronic applications due to the electron-rich nature of the thienopyridine core.