(S)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(2,4-dichlorophenyl)propanoic acid is primarily used in peptide synthesis. It serves as a protected amino acid derivative, where the fluorenylmethoxycarbonyl (Fmoc) group acts as a protecting group for the amino functionality during the synthesis process. This compound is particularly valuable in solid-phase peptide synthesis (SPPS), enabling the stepwise construction of peptides with high precision and efficiency. The Fmoc group can be selectively removed under mild basic conditions, allowing for the controlled addition of amino acids without disrupting the peptide chain. Its application is crucial in the production of complex peptides and proteins for research, pharmaceuticals, and biotechnology.