Cinnoline is primarily utilized in the field of medicinal chemistry due to its unique structural properties, which make it a valuable scaffold for drug development. It is often incorporated into compounds that exhibit a range of biological activities, including antimicrobial, antiviral, and anticancer properties. Researchers have explored cinnoline derivatives as potential inhibitors for various enzymes and receptors, making them promising candidates for therapeutic agents. Additionally, cinnoline-based compounds are studied for their potential use in treating neurological disorders, such as Alzheimer's disease, due to their ability to interact with specific targets in the brain. Beyond pharmaceuticals, cinnoline derivatives are also investigated in material science for their potential applications in organic electronics and as fluorescent probes in biochemical research.