Fmoc-3,3-diphenyl-L-alanine is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a key building block for introducing diphenylalanine moieties into peptide chains, which can enhance the peptide's stability and binding affinity. This compound is especially valuable in the development of peptide-based drugs and biomaterials, where the incorporation of bulky aromatic groups can influence the peptide's conformational properties and interactions with biological targets. Additionally, it is utilized in the synthesis of peptidomimetics and in research focused on studying peptide-protein interactions, making it a crucial tool in medicinal chemistry and biochemistry.