Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in medicinal chemistry for constructing quinazoline-based drugs that target epidermal growth factor receptor (EGFR) and other tyrosine kinases. Its structure allows for selective modifications, enabling optimization of biological activity and pharmacokinetic properties in drug candidates. Also employed in research settings to develop new bioactive molecules with potential antitumor, anti-inflammatory, and antimicrobial activities.