Used as a chiral building block in the synthesis of complex peptides and β-lactam antibiotics. Its protected amine and carboxylic acid groups allow selective deprotection and coupling in multi-step organic syntheses. Commonly employed in the preparation of enzyme inhibitors and pharmaceutical intermediates where stereochemistry is critical. The benzyl and tert-butyl protecting groups offer orthogonal stability under different reaction conditions, making it valuable in solid-phase and solution-phase peptide synthesis. Also utilized in the development of protease inhibitors and other bioactive molecules requiring high enantiomeric purity.