Z-Pro-OSu is widely used in peptide synthesis as a protecting group for proline residues. It helps in preventing unwanted side reactions during the formation of peptide bonds, ensuring higher yield and purity of the final peptide product. This compound is particularly valuable in solid-phase peptide synthesis (SPPS), where it facilitates the stepwise addition of amino acids. Additionally, Z-Pro-OSu is employed in the preparation of proline-containing peptides for research in biochemistry and pharmaceutical development, aiding in the study of peptide structure and function. Its stability and ease of removal make it a preferred choice in synthetic organic chemistry for constructing complex peptide sequences.