Z-Ala-OSu is widely used in peptide synthesis as an activated ester for the introduction of alanine residues into peptide chains. It serves as a key building block in solid-phase peptide synthesis (SPPS) and solution-phase peptide synthesis, enabling efficient coupling reactions due to its high reactivity with amino groups. The compound is particularly valued for its stability and selectivity, making it suitable for the synthesis of complex peptides and proteins. Additionally, it is employed in the preparation of peptide analogs and derivatives for biochemical and pharmaceutical research, aiding in the development of therapeutic agents and studies of protein structure and function. Its application extends to the production of custom peptides for drug discovery and bioconjugation strategies.