Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective modification, making it valuable in creating targeted therapies. Commonly employed in research settings to build active ingredients in anticancer agents, especially those targeting epidermal growth factor receptor (EGFR) pathways. Also utilized in the preparation of fluorescent probes due to its stable aromatic core and reactive sites, aiding in biochemical imaging and assay development.