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. Its structure allows for selective substitution at multiple positions, enabling fine-tuning of biological activity and pharmacokinetic properties in drug design. Also employed in research settings to develop new bioactive molecules with potential antitumor, antiviral, or anti-inflammatory effects.