(S)-2-Acetamido-2-phenylacetic acid is primarily utilized in the field of organic synthesis and pharmaceuticals. It serves as a key intermediate in the production of various chiral compounds, particularly in the synthesis of enantiomerically pure drugs. This compound is often employed in the development of antibiotics and other therapeutic agents, where its chiral center plays a crucial role in enhancing the efficacy and specificity of the final product. Additionally, it is used in research settings to study enzyme mechanisms and stereochemical reactions, contributing to advancements in medicinal chemistry and drug design. Its application extends to the preparation of peptides and peptidomimetics, which are essential in the development of targeted therapies for diseases such as cancer and infectious diseases.