(S)-S-Isopropyl 2-((tert-butoxycarbonyl)amino)propanethioate is primarily used in organic synthesis, particularly in the preparation of peptides and other bioactive molecules. It serves as a key intermediate in the development of pharmaceuticals, enabling the introduction of specific functional groups into complex molecules. The compound is often employed in the protection of amino groups during peptide synthesis, where the tert-butoxycarbonyl (Boc) group acts as a protecting group, ensuring selective reactions at other sites. Additionally, its thioester functionality makes it valuable in coupling reactions, facilitating the formation of amide bonds, which are crucial in peptide and protein chemistry. This compound is also utilized in the synthesis of chiral compounds, leveraging its stereochemistry to produce enantiomerically pure products, which are essential in drug development and medicinal chemistry.