Used in the synthesis of pharmaceutical intermediates, particularly in the development of selective estrogen receptor modulators (SERMs). It serves as a key building block in creating compounds with potential applications in hormone therapy and the treatment of hormone-related cancers. Its structure allows for functionalization that enhances binding affinity to estrogen receptors, making it valuable in medicinal chemistry research. Also employed in the preparation of dyes and functional materials due to its electron-donating aromatic amine group and flexible side chain.