N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride is a protected amino acid N-carboxyanhydride derived from L-ornithine, bearing two Boc (tert-butoxycarbonyl) groups on the α-amino and δ-amino positions to define a diamino acid framework for controlled peptide-building chemistry. As an N-carboxyanhydride, the molecule features a cyclic activated carbonyl system derived from the carboxylic acid, while the Boc-protected amino functionalities suppress free amine reactivity and provide chemoselectivity during polymerization or peptide coupling steps. In peptide synthesis workflows, this activated intermediate is used as a monomeric building block to generate ornithine-containing peptide segments or related amino acid polymers under conditions that open the N-carboxyanhydride and incorporate the protected ornithine residue into larger peptide structures.
CAT No: CP08717
N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride is a Boc-protected ornithine-derived amino acid N-carboxyanhydride (NCA) that encodes two orthogonal carbamate-protected nitrogens while retaining the reactive NCA carbonyl for controlled peptide bond formation. The L-ornithine stereochemistry fixes the chiral center used to generate stereodefined peptide sequences, and the side-chain length supports incorporation of lysine-like, diamine-containing motifs after deprotection. Dual N-α and N-δ Boc groups provide robust protection during coupling and allow downstream orthogonal deprotection or functionalization of the side-chain amine. The NCA functionality participates in nucleophilic ring-opening chemistry under peptide-synthesis conditions, making the compound a process-relevant intermediate for constructing protected peptide fragments and ornithine-rich scaffolds.
1. Peptide Synthesis
N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride is used in peptide synthesis workflows that rely on N-carboxyanhydride chemistry for rapid, stereodefined assembly of protected peptide building blocks. The NCA ring-opening reactivity engages nucleophiles such as amino termini or growing peptide chains, while the Boc-protected α- and δ-nitrogens remain stable to preserve the intended protection pattern. The resulting Boc/Boc-protected peptide segments can be carried forward through iterative couplings, enabling controlled incorporation of ornithine residues into peptide backbones without premature side-chain amine interference. Downstream deprotection strategies can then expose the side-chain δ-amine for further derivatization, cyclization, or conjugation, supporting protected peptide fragment generation for biochemical research and manufacturing-scale peptide intermediate preparation.
2. Peptidomimetics Construction
N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride supports peptidomimetic construction where protected diamine functionality is required to tune charge, hydrogen-bonding, and intramolecular recognition. The orthogonally Boc-protected α- and δ-positions allow selective transformation of the side-chain amine after peptide assembly, facilitating access to guanidinium-like motifs, amide/urea linkages, or tethered functional groups that mimic bioactive pharmacophores. NCA-mediated incorporation helps maintain stereochemical integrity at the ornithine chiral center while assembling defined oligomeric scaffolds. The protected intermediate nature of the NCA also enables downstream conversion into functionalized analogs used for structure-activity relationship studies and molecular scaffold elaboration in synthetic organic chemistry.
3. Chemical Biology Labeling
N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride is applied in chemical biology and biomolecule modification strategies that require controlled presentation of an ornithine side-chain amine for conjugation chemistry. The Boc-protected δ-amine can be unveiled under orthogonal deprotection conditions after peptide or oligomer assembly, allowing attachment of electrophilic tags, affinity handles, or reactive linkers while minimizing off-target labeling during synthesis. The NCA-derived peptide linkage formation supports the preparation of defined, stereochemically consistent labeling reagents such as protected peptide conjugation intermediates. Downstream functional group installation enables generation of labeled peptides and ornithine-containing probes suitable for mechanistic studies, imaging reagent development, and biochemical research intermediate preparation.
4. Process Chemistry Intermediate
N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride is suitable for process chemistry intermediate preparation in industrial peptide manufacturing routes that benefit from NCA-based polymerization or oligomerization control to form protected peptide fragments. The dual Boc carbamate protection pattern supports handling stability and reduces side reactions associated with free amines, while the NCA reactivity provides a mechanistic handle for nucleophile-driven chain growth under controlled conditions. The stereodefined L-ornithine core helps maintain consistent chiral composition across batches, which is relevant for downstream purification and conversion steps in fine chemical synthesis. The resulting Boc-protected oligomers or peptide intermediates can be further processed into drug-discovery tool compounds, specialty peptide building blocks, or other manufacturing-grade intermediates requiring predictable protection-group behavior.
5. Analytical Standards Development
N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride is used for analytical research and method development where ornithine-containing protected peptide standards are required for LC-MS, HPLC, and derivatization-based assays. The compound's Boc-protected α- and δ-nitrogens provide chromatographically distinguishable, chemically stable forms that can be converted into reference peptides with defined sequences and protecting-group patterns. NCA-derived oligomer or monomer incorporation enables preparation of stereochemically consistent standards that reflect the same protection chemistry used in synthesis, improving interpretability of fragmentation and derivatization behavior. Downstream deprotection and side-chain functionalization can generate additional reference materials for quantification of ornithine-derived motifs in peptide mixtures, supporting analytical characterization in biochemical research and industrial quality control workflows.
6. Side-Chain Functionalization
N-α-Boc-N-δ-Boc-L-ornithine N-carboxyanhydride is applied to side-chain functionalization strategies that leverage the ornithine δ-amine for post-assembly derivatization. The Boc protection on the δ-nitrogen suppresses uncontrolled reactivity during peptide bond formation, while enabling later, targeted unmasking to introduce amide, alkylated, acylated, or cyclized functionalities. The NCA-mediated incorporation into peptide scaffolds preserves the chiral ornithine center, supporting stereodefined functional group placement that can influence molecular recognition and reactivity in downstream transformations. The resulting functionalized ornithine-containing peptides or oligomers can serve as intermediates for peptidomimetic design, biomolecule conjugation reagents, and fine chemical synthesis of nitrogen-rich scaffolds.
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