Used in peptide synthesis as a chiral building block for introducing constrained amino acid residues into peptides. The Fmoc group allows for solid-phase synthesis by providing orthogonal protection for the amino group, enabling stepwise assembly of peptide chains. The bromoalkene moiety serves as a reactive handle for further modification via cross-coupling reactions or as a structural mimic in bioactive peptide analogs. Its D-configuration imparts resistance to proteolytic degradation, making it useful in designing metabolically stable peptide-based therapeutics. Commonly applied in medicinal chemistry for developing enzyme inhibitors or probing structure-activity relationships in peptide receptors.