N-α-Fmoc-N-ε-Z-L-lysine N-carboxyanhydride is a lysine-derived amino acid carboxyanhydride bearing an Nα Fmoc protecting group and an Nε Cbz (Z) protecting group, with the lysine side chain featuring a terminal ε-amino functionality protected as a carbamate. As an N-carboxyanhydride, the molecule contains a reactive cyclic anhydride at the carboxyl-derived position while retaining the protected amino groups that control chemoselectivity during polymerization or peptide bond formation, and the name indicates an L-lysine stereochemical basis. In synthetic peptide chemistry, it is employed as a carboxyanhydride building block for generating protected lysine-containing peptide segments and for preparing well-defined peptide-related intermediates under conditions compatible with Fmoc/Cbz-protected amino acid frameworks.
CAT No: CP01451
N-α-Fmoc-N-ε-Z-L-lysine N-carboxyanhydride is a lysine-derived amino acid anhydride designed for solid-phase peptide synthesis and related carboxyanhydride chemistry. The structure incorporates the L-lysine stereocenter, a protected α-amino group masked as an N-carboxyanhydride for rapid peptide bond formation, and orthogonally protected side-chain functionality via an ε-Z (benzyloxycarbonyl) group. The Fmoc group on the α-nitrogen provides a base-labile protecting handle for stepwise deprotection and coupling control, while the anhydride carbonyl system confers high reactivity toward nucleophilic amines under peptide synthesis conditions. The resulting material functions as a chiral, protected lysine building block that can be incorporated into peptide sequences, enabling downstream side-chain deprotection and functionalization while maintaining stereochemical integrity.
1. Peptide Synthesis
N-α-Fmoc-N-ε-Z-L-lysine N-carboxyanhydride is used in peptide synthesis workflows where carboxyanhydride-mediated coupling supports rapid formation of lysine-containing sequences. The lysine side chain bearing the ε-Z protecting group enables orthogonal handling of the side-chain amine relative to the α-amino chemistry, supporting controlled exposure of the ε-nucleophile at later stages. Fmoc functionality enables base-triggered deprotection strategies that align with standard stepwise assembly and can be integrated into iterative coupling cycles. Incorporation of the chiral lysine unit supports stereodefined peptide analog construction and provides a protected scaffold for subsequent side-chain derivatization. Lysine anhydride chemistry thus serves as a practical route to protected peptide building blocks and sequence-specific peptide targets.
2. Side-Chain Functionalization
N-α-Fmoc-N-ε-Z-L-lysine N-carboxyanhydride is applied to side-chain functionalization programs that rely on orthogonal protection of the ε-amino group. The ε-Z (carbobenzyloxy) group can be removed under conditions compatible with peptide-derived intermediates, enabling conversion of the lysine side-chain into reactive amine handles for acylation, alkylation, or conjugation chemistry. The preserved L-configuration and the protected peptide-compatible framework help maintain structural fidelity during multistep modification sequences. Fmoc protection on the α-nitrogen supports controlled deprotection timing, which can be used to manage chemoselectivity during sequential transformations. Downstream products include functional lysine-containing peptide fragments, amine-reactive conjugation motifs, and derivatized peptidomimetic scaffolds for chemical biology and materials studies.
3. Bioconjugation Chemistry
N-α-Fmoc-N-ε-Z-L-lysine N-carboxyanhydride is suitable for bioconjugation workflows that require lysine-based attachment points with controlled deprotection and coupling behavior. The protected ε-amino group provides a latent nucleophile that can be unmasked after peptide assembly, supporting conjugation to electrophiles such as activated esters, isothiocyanates, aldehydes, or other amine-reactive partners. The anhydride-based peptide building block format can be used to generate defined peptide linkers with a stereochemically consistent lysine residue, which is relevant for reproducible conjugate structure. Fmoc-based orthogonality supports staged synthesis, allowing conjugation to be introduced after sequence construction while minimizing side reactions during earlier steps. Resulting conjugates may serve as labeled probes, affinity reagents, or modular linker components for biomolecule modification and analytical assay development.
4. Process Chemistry Intermediate
N-α-Fmoc-N-ε-Z-L-lysine N-carboxyanhydride is used as a manufacturing-oriented intermediate for producing protected lysine derivatives and peptide-grade building blocks at scale. The compound's carboxyanhydride functionality is designed to undergo controlled nucleophilic ring opening during peptide coupling, aligning with industrially relevant process chemistry for protected amino acid ester/anhydride analogs. Orthogonal protection between the α-system (Fmoc) and ε-side chain (Z) supports predictable protection/deprotection sequences that can be mapped onto batch manufacturing steps for peptide intermediates. The chiral L-lysine backbone enables stereospecific incorporation into downstream products, reducing the need for racemate resolution in later stages. Industrial utilization can extend to fine chemical synthesis where defined protected amino acid derivatives are required for consistent peptide intermediate supply chains.
5. Analytical Research Standards
N-α-Fmoc-N-ε-Z-L-lysine N-carboxyanhydride is applied in analytical research contexts where defined lysine-containing peptide standards and calibration materials are required. The protected α-amino system and ε-Z side-chain protection support generation of reproducible peptide fragments that can be used to validate LC-MS behavior, fragmentation patterns, and derivatization chemistry for lysine-rich sequences. Fmoc and Z groups provide chemically distinct deprotection endpoints, enabling method development that distinguishes coupling completeness, protecting-group integrity, and side-chain modification state. The stereodefined L-lysine unit helps ensure that analytical signals correspond to a single structural stereochemical outcome rather than mixed isomers. Downstream use includes preparation of reference peptides, method controls for peptide synthesis monitoring, and characterization supports for amino acid derivative transformation studies.
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