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 due to its reactive halogen sites, which allow for selective cross-coupling reactions such as Suzuki or Buchwald-Hartwig aminations. Commonly employed in the preparation of bioactive quinazoline derivatives with potential antitumor, anti-inflammatory, and antimicrobial properties. Also utilized in research settings to design and optimize new drug candidates targeting tyrosine kinase and other enzyme systems.