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 halogenated quinazoline core, which allows for selective cross-coupling reactions. Commonly employed in research settings to design and optimize bioactive molecules targeting tyrosine kinases and other enzyme families involved in signal transduction pathways. Its structural features make it valuable in structure-activity relationship (SAR) studies for drug discovery.