(S)-tert-Butyl (1-phenylbut-3-en-2-yl)carbamate is primarily used in organic synthesis as a key intermediate in the production of various pharmaceuticals and bioactive compounds. Its chiral structure makes it valuable in the development of enantioselective drugs, particularly in the synthesis of molecules with specific stereochemical requirements. The compound is often employed in the preparation of peptide analogs and other nitrogen-containing compounds, where the tert-butyl carbamate group serves as a protecting group for amines during multi-step synthetic processes. Additionally, it finds application in the research and development of potential therapeutic agents targeting neurological disorders, cancer, and infectious diseases, owing to its ability to modulate biological pathways effectively.