Used in peptide synthesis as a protected amino acid building block. The Boc (tert-butoxycarbonyl) group provides temporary protection for the amine functionality, allowing selective reaction at other sites during stepwise assembly of peptides. The styryl group introduces a conjugated side chain that can participate in photophysical studies or act as a probe in biochemical assays. The dicyclohexylamine salt form enhances stability and crystallinity, improving handling and storage. Commonly applied in the development of bioactive peptides, enzyme inhibitors, and pharmaceutical intermediates where stereochemical control (D-configuration) is required. Also useful in solid-phase synthesis and combinatorial chemistry for drug discovery.