Used in solid-phase peptide synthesis as a chiral building block for introducing a long-chain alkenyl-modified amino acid residue into peptide sequences. The Fmoc group allows for mild base-labile protection during stepwise synthesis, making it compatible with standard Fmoc-strategy protocols. The terminal alkene side chain serves as a handle for post-synthetic modifications, such as cross-metathesis or thiol-ene reactions, enabling site-specific conjugation to labels, polymers, or surfaces. Commonly applied in the development of bioconjugates, peptide-protein hybrids, and functional biomaterials where precise chemical modification is required. Its stereochemistry ensures correct folding and biological activity in chiral-sensitive peptides.