Used in peptide synthesis as a chiral building block for introducing naphthyl-containing amino acid derivatives. The Fmoc group enables solid-phase synthesis by providing orthogonal protection for the amine functionality. Its bulky aromatic structure enhances stereocontrol during coupling reactions and can influence the conformation of the resulting peptide. Commonly applied in the development of enzyme inhibitors, bioactive peptides, and foldamers where aromatic stacking and defined stereochemistry are important. Also utilized in medicinal chemistry for structure-activity relationship studies due to its rigid side chain and ability to mimic natural amino acids.