N-α-Fmoc-N-ε-Boc-L-lysine N-carboxyanhydride is a protected lysine-derived amino acid N-carboxyanhydride (NCA) bearing an Nα Fmoc group and an Nε Boc carbamate, with the lysine side chain terminating in a protected ε-amino functionality. The NCA ring activates the amino acid for ring-opening polymerization chemistry while the Fmoc and Boc protecting groups remain on the nitrogen sites, and the molecule is specified as the L-lysine stereochemical form. In peptide synthesis and related amino acid polymer chemistry, this NCA is used as an activated intermediate that can generate lysine-containing peptide fragments under conditions that promote NCA ring opening while preserving chemoselectivity through the orthogonal Fmoc/Boc protection pattern.
CAT No: CP01438
N-α-Fmoc-N-ε-Boc-L-lysine N-carboxyanhydride is a protected lysine-derived amino acid NCA that serves as an activated carboxylic acid equivalent for rapid peptide bond formation under NCA chemistry. The structure encodes the L-lysine stereocenter and presents an Fmoc group on the α-nitrogen alongside a Boc-protected ε-amino side chain, yielding a bifunctionally protected building block with orthogonal deprotection handles. The N-carboxyanhydride moiety is highly reactive toward nucleophiles, enabling controlled incorporation into peptide chains while preserving the protected amine functionality for subsequent side-chain chemistry. The presence of both Fmoc and Boc groups supports stepwise synthetic strategies that separate backbone activation from later functional group unveiling, making the compound suitable as a peptide synthesis intermediate and chiral amino acid derivative for downstream derivatization.
1. NCA Peptide Synthesis
N-α-Fmoc-N-ε-Boc-L-lysine N-carboxyanhydride is applied in peptide synthesis workflows that use N-carboxyanhydride activation to form amide bonds from protected nucleophilic initiators. The NCA functionality enables polymerization-like or iterative chain growth modes, while the Fmoc-protected α-amino and Boc-protected ε-amino groups remain compatible with standard orthogonal protection strategies. The lysine side chain protection supports later steps such as selective deprotection and coupling without premature ε-amide formation. The resulting peptide intermediates can be carried into protected peptide fragment assembly and can be used to generate sequence-defined lysine-containing segments for chemical biology and materials-oriented peptide scaffolds.
2. Protected Amino Acid Chemistry
N-α-Fmoc-N-ε-Boc-L-lysine N-carboxyanhydride is used as a protected amino acid derivative for constructing orthogonally protected lysine residues in synthetic organic chemistry. The compound's dual protection pattern, with Fmoc on the α-nitrogen and Boc on the ε-amino group, enables staged deprotection and selective functional group exposure during multistep synthesis. The reactive NCA center can be converted into peptide-ready amide linkages while maintaining the stereochemical integrity of the L-lysine backbone. Downstream, the protected lysine units can be transformed into side-chain functionalized analogs, including derivatives designed for conjugation, crosslinking, or incorporation into peptidomimetic frameworks.
3. Chemical Biology Labeling
N-α-Fmoc-N-ε-Boc-L-lysine N-carboxyanhydride is suitable for chemical biology applications that require lysine-containing peptides or peptide fragments bearing orthogonally protected amines for controlled labeling. The Boc-protected ε-amino group can be unveiled at a chosen stage to enable attachment of electrophiles, tags, or affinity handles, while the Fmoc group supports backbone-level protection during assembly. NCA-based incorporation can generate defined lysine positions within peptide sequences, which is critical for reproducible conjugation patterns and for building probes used in biomolecular interaction studies. The compound thereby supports downstream formation of labeled peptide constructs used in biomolecule modification and molecular recognition assays.
4. Peptidomimetics And SAR Studies
N-α-Fmoc-N-ε-Boc-L-lysine N-carboxyanhydride is applied in peptidomimetic construction and structure-activity relationship studies where lysine side-chain chemistry and stereochemical control influence molecular recognition. The protected lysine residue enables incorporation into peptide analogs that later undergo side-chain derivatization, such as conversion to guanidinium-mimicking motifs, charged linkers, or constrained scaffolds through ε-amino functional transformations. The NCA activation supports efficient generation of amide-linked building blocks that can be further elaborated into non-natural analog series while retaining the L-configuration at the lysine stereocenter. The resulting analog libraries can be used as research-grade intermediates for SAR mapping, fragment elaboration, and molecular design campaigns.
5. Pharmaceutical Intermediate Preparation
N-α-Fmoc-N-ε-Boc-L-lysine N-carboxyanhydride is relevant to pharmaceutical intermediate preparation for manufacturing routes that require protected amino acid building blocks with orthogonal deprotection logic. The Fmoc and Boc groups provide a practical framework for stepwise assembly and purification of peptide intermediates, supporting process-compatible protection/deprotection sequencing during fine chemical production. The NCA center functions as an activated intermediate that can be employed to generate lysine-containing peptide fragments used in downstream synthesis of peptide-based active ingredient candidates or related research materials. The compound's defined stereochemistry and protected functionality make it suitable for producing consistent, sequence-defined intermediates that feed into larger-scale peptide manufacturing operations.
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