Used as a key intermediate in the synthesis of β-lactam antibiotics, particularly in the preparation of carbapenem-class antibiotics. Its structure allows for selective functionalization at multiple positions, enabling the construction of complex antibiotic side chains. The tert-butyl and tosyl protecting groups facilitate stepwise deprotection and coupling reactions, making it valuable in multi-step organic syntheses for pharmaceuticals. Commonly employed in industrial-scale production due to its stability and reactivity profile.