Used as a key intermediate in the synthesis of biologically active molecules, particularly in the preparation of peptidomimetics and pharmaceuticals. Its chiral center and protected amine group make it valuable in asymmetric synthesis, where stereochemistry is critical. The tosylate group acts as a good leaving group, enabling nucleophilic substitution reactions to introduce various functional groups. Commonly employed in the development of enzyme inhibitors and receptor ligands, especially in research targeting protease inhibitors and central nervous system agents. Widely utilized in medicinal chemistry for building complex molecules with high enantiomeric purity.