Used in peptide synthesis as a protected building block, enabling selective amide bond formation while minimizing side reactions. The Fmoc group allows for mild base deprotection, making it compatible with solid-phase synthesis strategies. The chloro substituent provides a handle for further functionalization via cross-coupling reactions, useful in the preparation of complex bioactive molecules and pharmaceutical intermediates. Its structure supports the development of constrained peptides and peptidomimetics with enhanced stability and target specificity.