Used as a key intermediate in the synthesis of fluorinated pyrido[4,3-d]pyrimidine derivatives with potential pharmaceutical applications, particularly in the development of kinase inhibitors for cancer therapy. Its halogen substitution pattern allows selective functionalization through cross-coupling reactions, enabling the construction of complex heterocyclic systems in medicinal chemistry research. Commonly employed in the preparation of bioactive molecules targeting tyrosine kinases and other enzyme families involved in signal transduction pathways.