Used primarily as an intermediate in the synthesis of peptide-based pharmaceuticals, this compound enables the controlled addition of amino acid residues in solid-phase or solution-phase peptide coupling. Its activated carboxyanhydride group facilitates efficient amide bond formation without requiring additional coupling agents, making it valuable in the preparation of complex peptides with high purity. It is particularly useful in the development of angiotensin-converting enzyme (ACE) inhibitors and other bioactive peptides where precise stereochemistry and functional group compatibility are critical.