Widely used in peptide synthesis as a protected amino acid building block, this compound enables the introduction of reactive alkene side chains into peptide sequences. The Fmoc group provides orthogonal protection for the alpha-amino function, allowing stepwise assembly of peptides under mild basic conditions. The terminal alkenes on the side chain and main chain offer sites for post-synthetic modifications via thiol-ene chemistry or cross-metathesis, making it valuable for preparing functionalized peptides, peptide conjugates, or hydrogels. Its design supports solid-phase synthesis and is particularly useful in developing peptide-based biomaterials and bioconjugates.