Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of bioactive molecules and active pharmaceutical ingredients (APIs) where stereochemistry plays a critical role. Its protected amine groups allow for selective reactions in multi-step organic syntheses, especially in the preparation of β-amino alcohols and related structures. Commonly employed in the production of central nervous system agents, including antidepressants and antiviral drugs, due to its ability to mimic natural amino acid motifs while enhancing metabolic stability. Also utilized in asymmetric synthesis and catalysis as an intermediate for enantioselective transformations.