Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of quinoline-based drugs with antimalarial and anticancer properties. It serves as a building block in organic reactions where the bromo group allows for cross-coupling reactions, such as Suzuki or Heck couplings, enabling the introduction of various functional groups. The nitrile group can be transformed into carboxylic acids, amides, or tetrazoles, expanding its utility in drug design. Also employed in the preparation of fluorescent dyes and materials for optoelectronic applications due to the inherent photophysical properties of the quinoline scaffold.