Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of antimalarial drugs. It serves as a building block in organic reactions where the quinoline ring system is required, offering sites for functionalization due to its reactive ester and aromatic groups. Commonly employed in research settings for the preparation of bioactive molecules and in medicinal chemistry for structure-activity relationship studies. Also utilized in the production of agrochemicals and dyes where substituted quinoline derivatives are needed.