4-Chloroquinoline-6-carboxylic acid is primarily utilized in the synthesis of various pharmaceutical compounds, particularly those with antimalarial properties. It serves as a key intermediate in the production of chloroquine derivatives, which are widely used to treat and prevent malaria. Additionally, this compound is employed in the development of other quinoline-based drugs that exhibit antimicrobial and anticancer activities. Its role in medicinal chemistry is significant due to its ability to act as a building block for creating molecules with therapeutic potential. Research also explores its use in organic synthesis for constructing complex heterocyclic compounds, which are valuable in drug discovery and development processes.