Used as an intermediate in the synthesis of active pharmaceutical ingredients, particularly in the development of beta-lactam antibiotics. Its structure allows for selective functionalization of the azetidine ring, making it valuable in medicinal chemistry for constructing constrained heterocyclic scaffolds. The BOC group provides amine protection, while the tosyl group acts as a leaving group, enabling nucleophilic substitution reactions. Commonly employed in the preparation of kinase inhibitors and other bioactive molecules where ring strain and geometry influence potency and selectivity.