Used as a key intermediate in the synthesis of antimalarial drugs, particularly in the production of chloroquine and related derivatives. Its structure allows for functional modifications that enhance pharmacological activity against Plasmodium species. Also employed in the development of fluorescent probes due to its quinoline backbone, which can intercalate into DNA, making it useful in biochemical assays. Additionally, it serves as a building block in the preparation of novel heterocyclic compounds for medicinal chemistry research.