D-2-Phenylglycine is widely used as a chiral building block in the synthesis of pharmaceuticals, particularly in the production of beta-lactam antibiotics such as semisynthetic penicillins and cephalosporins. It serves as a key intermediate in the manufacture of amoxicillin and cefaclor, contributing to their antibacterial properties. Additionally, it is employed in the preparation of other bioactive compounds, including peptidomimetics and enzyme inhibitors, due to its ability to introduce chirality into molecules. Its role in asymmetric synthesis also makes it valuable in the development of enantiomerically pure drugs, enhancing their efficacy and reducing side effects.