Widely used in peptide synthesis, this compound serves as a chiral building block for introducing allyl-containing amino acid residues with high stereocontrol. Its Fmoc protection allows for mild deprotection conditions compatible with solid-phase synthesis, making it ideal for constructing complex peptides and modified proteins. The terminal alkene in the side chain enables further functionalization via cross-metathesis or hydrofunctionalization reactions, facilitating the introduction of labels, tags, or cyclic structures through ring-closing metathesis. It is particularly valuable in the development of peptide-based drugs, macrocyclic compounds, and bioconjugates where precise stereochemistry and side-chain versatility are critical.