Used in peptide synthesis as a protected intermediate for producing bioactive peptides containing tryptophan and glycine residues. Its trifluoroacetate salt form enhances solubility and stability during solid-phase or solution-phase coupling reactions. Commonly applied in the development of pharmaceuticals targeting neurological pathways due to the indole moiety’s role in mimicking serotonin-like structures. Also utilized in research settings to design enzyme inhibitors and receptor ligands where stereochemistry is critical for activity.