Used as a key intermediate in the synthesis of beta-lactam antibiotics, particularly in the preparation of carbapenem and penem classes. Its structure allows for the introduction of side chains that enhance antibiotic activity and resistance to beta-lactamase enzymes. The bromomethyl group enables alkylation reactions, while the hydroxyl and tosyl-protected azetidine functionalities support further functionalization in multi-step organic syntheses. Commonly employed in pharmaceutical research for developing novel antimicrobial agents.