Used in organic synthesis as an intermediate for pharmaceuticals, particularly in the development of nitrogen-containing heterocyclic compounds. Its iodine substituent allows for cross-coupling reactions, such as Suzuki or Heck reactions, enabling the construction of complex molecules for medicinal chemistry research. Commonly employed in the synthesis of potential kinase inhibitors and antimicrobial agents. Also utilized in the preparation of fluorescent probes due to the inherent photophysical properties of the quinolinone core.