4-Methylquinoline-2-carboxylic acid is primarily used in the synthesis of various pharmaceutical compounds. It serves as a key intermediate in the production of drugs targeting bacterial infections, particularly in the development of quinolone antibiotics. These antibiotics are effective against a wide range of Gram-positive and Gram-negative bacteria, making them valuable in treating respiratory, urinary, and gastrointestinal infections. Additionally, this compound is utilized in organic chemistry research for the creation of complex heterocyclic structures, which are essential in drug discovery and development. Its role in the synthesis of bioactive molecules also extends to potential applications in anti-inflammatory and anticancer agents.