Used as an intermediate in the synthesis of β-lactam antibiotics, particularly in the preparation of carbapenem and penem classes. Its structure allows for the introduction of specific side chains that enhance antibiotic activity and stability against β-lactamase enzymes. Commonly employed in medicinal chemistry for constructing complex heterocyclic systems found in potent antimicrobial agents. Also utilized in solid-phase peptide synthesis due to the presence of the carboxylic acid and protected amine functionalities, enabling selective coupling reactions.