Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in the preparation of active pharmaceutical ingredients (APIs) targeting tyrosine kinase receptors, which play a role in tumor growth and progression. Its structure allows for selective modification, enabling optimization of drug potency and selectivity. Commonly employed in research and development of antitumor agents and in medicinal chemistry for structure-activity relationship (SAR) studies.