Used as a key intermediate in the synthesis of sulfonamide-based pharmaceuticals, particularly in the development of antimalarial and anticancer agents. Its bromo and sulfonyl chloride functional groups allow selective derivatization, enabling the construction of complex heterocyclic systems. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to enhance binding affinity and metabolic stability in drug candidates. Also utilized in the preparation of fluorescent probes for bioimaging, leveraging the quinoline core’s inherent photophysical properties.