Used as an intermediate in the synthesis of pharmaceuticals, particularly in the production of beta-lactam antibiotics. It serves as a building block for active pharmaceutical ingredients (APIs) due to its amine and ester functional groups, which allow for further chemical modifications. Commonly employed in the development of antibiotics like penicillins and cephalosporins, where it contributes to the side chain structure, enhancing biological activity and stability. Also utilized in the preparation of protease inhibitors and other bioactive molecules in medicinal chemistry research.