(S)-3-Amino-3-phenylpropanoic acid is primarily utilized in the pharmaceutical industry as a key intermediate in the synthesis of various active pharmaceutical ingredients (APIs). Its chiral structure makes it valuable for producing enantiomerically pure compounds, which are crucial in drug development to ensure efficacy and minimize side effects. This compound is often employed in the production of beta-amino acids, which are building blocks for peptides and peptidomimetics used in therapeutic agents. Additionally, it serves as a precursor in the synthesis of inhibitors for enzymes like gamma-secretase, which is relevant in the treatment of Alzheimer's disease. Its applications also extend to research in organic chemistry, where it is used to study stereoselective reactions and develop novel synthetic methodologies.