Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of tyrosine kinase inhibitors for cancer treatment. It serves as a building block in the preparation of active pharmaceutical ingredients (APIs) targeting epidermal growth factor receptor (EGFR) inhibitors. Its structure allows for selective substitution at the 4-position, enabling the formation of compounds with high biological activity. Commonly employed in research and industrial settings for the production of antineoplastic agents. Also utilized in the optimization of drug candidates due to its favorable reactivity and stability in multi-step organic syntheses.