Used in peptide synthesis as an activated building block for the sequential addition of glycine residues. The Boc (tert-butoxycarbonyl) group provides temporary N-terminal protection, allowing controlled coupling in solid-phase or solution-phase synthesis. The OSU (N-hydroxysuccinimide) ester enhances reactivity, enabling efficient amide bond formation under mild conditions. Commonly employed in the preparation of dipeptide mimics, linkers for bioconjugation, and intermediates in the synthesis of more complex peptide-based molecules, including pharmaceuticals and biochemical probes. Its stability and selectivity make it suitable for automated peptide synthesis workflows.