Fmoc-(S)-3-amino-4-(3-chlorophenyl)-butyric acid is widely used in peptide synthesis as a building block. Its Fmoc group protects the amino functionality during the synthesis process, ensuring selective reactions. The compound is particularly valuable in the production of complex peptides and peptidomimetics, where the 3-chlorophenyl group contributes to specific biological interactions. It is also employed in the development of peptide-based drugs, where its structure can enhance binding affinity and stability. Additionally, it finds application in research for studying enzyme-substrate interactions and designing inhibitors for therapeutic targets.