Quinolines are a class of organic compounds characterized by a bicyclic structure that includes a benzene ring fused to a pyridine ring. They are primarily used in the synthesis of various pharmaceuticals and agrochemicals due to their biological activity. Quinolines can be found in several natural products and are known for their role in medicinal chemistry. One of the most notable derivatives of quinoline is chloroquine, which has been used to treat malaria. Additionally, quinolines exhibit antimicrobial, anti-inflammatory, and anticancer properties, making them significant in drug development and research. Their diverse applications highlight the importance of this compound in both science and medicine.