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. Its structure supports the creation of quinazoline-based derivatives that exhibit biological activity against various tumor cell lines. Additionally, it is employed in research settings to design and optimize new drug candidates targeting tyrosine kinase pathways.