Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring stereochemical control. Its protected amine group allows for selective deprotection and further functionalization, making it valuable in multi-step organic synthesis. Commonly employed in the preparation of drug candidates targeting central nervous system disorders, antimicrobial agents, and kinase inhibitors. The S-configuration enables specific interactions in biological systems, enhancing the efficacy and selectivity of the final drug compound.