Used as a key intermediate in the synthesis of quinazoline-based pharmaceutical compounds, particularly in the development of tyrosine kinase inhibitors. These inhibitors are important in targeted cancer therapies, especially for treating non-small cell lung cancer and other solid tumors. The compound’s structure allows for selective modification at multiple sites, enabling optimization of biological activity and pharmacokinetic properties in drug candidates. It is also employed in research settings for generating libraries of heterocyclic compounds for biological screening.