Used as a chiral intermediate in the synthesis of biologically active compounds, particularly in the development of peptide-based pharmaceuticals. Its protected amine groups and stereochemistry make it valuable for constructing enantioselective drug molecules, especially those targeting neurological and metabolic disorders. Commonly employed in solid-phase peptide synthesis where the benzyl ester acts as a carboxy-protecting group, removable under mild conditions. The tosyl groups provide solubility in polar organic solvents and stabilize the molecule during coupling reactions. Also utilized in the preparation of enzyme inhibitors and receptor agonists due to its structural similarity to natural amino acids.