Used as a key chiral intermediate in the synthesis of β-lactam antibiotics, particularly in the production of penem and carbapenem classes. Its strained azetidinone ring enables efficient ring-opening reactions, facilitating the formation of complex antibiotic scaffolds. The (R)-configuration ensures stereochemical control during coupling with side chains, which is critical for biological activity. Commonly employed in pharmaceutical research and development for optimizing antibiotic potency and resistance profiles.