Fmoc-3-(2-naphthyl)-alanine is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a building block for incorporating the 2-naphthyl group into peptides, which can enhance their binding affinity and stability. This compound is valuable in the development of peptide-based drugs, as the naphthyl group can improve interactions with target proteins or receptors. It is also utilized in the study of protein-protein interactions and in the design of peptide inhibitors for therapeutic applications. Additionally, its fluorescence properties make it useful in biochemical assays and imaging studies.