Used as an 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 bromo group, which allows for cross-coupling reactions such as Suzuki or Buchwald-Hartwig aminations. Its quinazoline core is commonly found in drugs targeting epidermal growth factor receptor (EGFR) pathways. Also employed in research settings to design and optimize new bioactive molecules with potential antitumor and anti-inflammatory activities.