Used as a chiral building block in the synthesis of peptide-based pharmaceuticals, particularly in the preparation of protected amino acid derivatives for solid-phase peptide synthesis. Its orthogonal protecting groups allow selective deprotection, enabling controlled sequential coupling of amino acids. Commonly employed in the development of enzyme inhibitors and bioactive peptides where stereochemistry is critical for activity. Also utilized in medicinal chemistry research for constructing complex molecules requiring high enantiomeric purity.