N-Phenylglycine ethyl ester is primarily utilized in organic synthesis as a key intermediate for the production of various pharmaceutical compounds. It plays a significant role in the synthesis of heterocyclic compounds, which are often used in the development of drugs targeting neurological and cardiovascular diseases. Additionally, it is employed in the preparation of dyes and pigments, contributing to the coloration of textiles and other materials. Its ester functionality makes it a versatile reagent in peptide synthesis, where it aids in the formation of peptide bonds. Furthermore, it is used in research laboratories for studying reaction mechanisms and developing novel chemical entities with potential therapeutic applications.