Used in organic synthesis and pharmaceutical research, particularly as a building block for nitrogen-containing heterocyclic compounds. Its vinyl group enables polymerization and functionalization, making it suitable for developing advanced materials and bioactive molecules. It has shown potential in the design of kinase inhibitors and other therapeutic agents due to the quinazoline core’s affinity for biological targets. Also explored in the development of fluorescent probes and optoelectronic materials owing to its conjugated structure.