Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and antimicrobial agents. Its structure allows for functionalization at multiple sites, making it valuable in medicinal chemistry for building bioactive molecules. Commonly employed in research settings to design and optimize new drug candidates targeting cancer and infectious diseases. Also utilized in the preparation of fluorescent probes due to the naphthyridine core’s photophysical properties, supporting applications in bioimaging and molecular sensing.