Used in the synthesis of pharmaceutical intermediates, particularly in the development of kinase inhibitors for cancer treatment. It serves as a key building block in the preparation of bioactive quinazoline derivatives that exhibit antitumor, anti-inflammatory, and antimicrobial activities. Its structure allows for selective modifications at multiple sites, enabling optimization of pharmacological properties. Commonly employed in research settings for structure-activity relationship (SAR) studies targeting tyrosine kinase and EGFR inhibition.