Boc-Orn(Z)-OSu

Boc-Orn(Z)-OSu is a Boc-protected ornithine derivative bearing a side-chain Z (benzyloxycarbonyl) protecting group and an activated N-hydroxysuccinimide ester (OSu) at the amino functionality. This combination makes the compound a practical, pre-activated amino acid building block for amide bond formation under peptide and bioconjugation-relevant conditions, while the Boc/Z groups provide orthogonal protection during multistep assembly. Researchers use this type of activated amino acid to introduce protected ornithine residues into larger constructs with controlled reactivity and minimized side reactions.

1. Peptide Segment Coupling

Boc-Orn(Z)-OSu is commonly used by peptide synthesis groups to couple an ornithine-containing segment during solution-phase peptide assembly and activated ester workflows. The OSu activation enables efficient formation of amide bonds with appropriately protected amine partners, helping streamline the incorporation of a protected, positively oriented side chain into longer peptides. The Boc and Z protecting groups support sequential protection strategies, allowing the ornithine residue to remain masked until later deprotection steps in the peptide synthesis sequence.

2. Protected Ornithine Building Block

Boc-Orn(Z)-OSu serves as a protected amino acid building block for making ornithine-rich peptide intermediates and peptidomimetic scaffolds where controlled side-chain functionality is required. The Z-protected side chain helps maintain compatibility with iterative coupling and purification cycles, while the Boc group provides a defined N-protection handle for downstream transformations. This makes the reagent useful for laboratories developing cationic peptide analogs, polycationic linkers, or ornithine-containing intermediates for further derivatization.

3. Amine-Targeted Bioconjugation

Boc-Orn(Z)-OSu is used in chemical biology and bioconjugation development as an activated NHS ester that can react with primary amines on peptides, linkers, or carrier biomolecules to form stable amide linkages. In workflows that require installing a protected ornithine moiety onto an amine-functional target, the OSu activation provides a convenient reactivity profile that can be tuned by reaction conditions and amine availability. The presence of Boc and Z protections helps ensure that the conjugation step focuses on the intended amide formation, with protected groups carried through to subsequent deprotection or further functionalization steps.

4. Pharmaceutical Intermediate Development

Boc-Orn(Z)-OSu is also applied in medicinal chemistry and pharmaceutical intermediate development when a protected ornithine unit must be introduced into larger, amide-containing intermediates. Process and development teams value the activated ester format for reliable coupling to amine-bearing intermediates, enabling modular construction of complex molecules that incorporate ornithine-derived motifs. The orthogonal protection pattern supports multistep synthesis planning by keeping the amino functionality masked during earlier stages, then enabling later unveiling of reactive sites for downstream transformations.

1. Effect of Probiotic Lactobacillus plantarum on Streptococcus mutans and Candida albicans Clinical Isolates from Children with Early Childhood Caries

2. Odorant binding protein based biomimetic sensors for detection of alcohols associated with Salmonella contamination in packaged beef

3. Identification, Localization in the Central Nervous System and Novel Myostimulatory Effect of Allatostatins in Tenebrio molitor Beetle

4. Immune-awakening Saccharomyces-inspired nanocarrier for oral target delivery to lymph and tumors

5. Low bone turnover and low BMD in Down syndrome: effect of intermittent PTH treatment