Used primarily as an intermediate in the synthesis of pharmaceuticals, especially in the development of antimalarial and anticancer agents. Its halogen substituents (chloro, fluoro, and iodo) allow for selective cross-coupling reactions, making it valuable in medicinal chemistry for building complex quinoline-based structures. The structure enhances binding affinity to biological targets, offering potential as a key active component in novel drugs. Additionally, it serves as a starting material for synthesizing fluorine-iodine compounds used in medical imaging research, such as PET (Positron Emission Tomography) scans, where iodine can act as a radiolabel.