Used extensively in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). The Fmoc group serves as a protecting group for the amino group, allowing for controlled deprotection and elongation of peptide chains. The presence of the chlorine atom on the phenyl ring can influence the peptide's interactions and stability, making it valuable in designing peptides with specific biological activities or properties. Commonly applied in the development of pharmaceuticals, bioactive peptides, and research tools for studying protein-protein interactions. Its unique structure also aids in creating modified peptides for targeted drug delivery systems or enzyme inhibitors.