Used as a key intermediate in the synthesis of quinazoline-based pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective substitution at multiple positions, making it valuable in medicinal chemistry for optimizing drug potency and selectivity. Commonly employed in the preparation of epidermal growth factor receptor (EGFR) inhibitors. Also utilized in research settings to explore new bioactive molecules with potential antitumor, anti-inflammatory, or antimicrobial properties.