N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin is a D-lysine derivative in which the α-amino functionality is substituted with a 1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethylidene-type group, while the ε-amino side chain is protected as a Boc carbamate. The molecule contains a free carboxyl group and an additional protected carbamate, with the α-substituent functioning as a structural modification that alters the amino reactivity profile relative to unprotected lysine. In peptide and amino-acid derivative synthesis, this protected, α-modified lysine analogue is used as a precursor for controlled chemoselective coupling and for introducing a defined, side-chain-protected lysine unit into larger peptide-related intermediates.
CAT No: CP01431
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin is a D-lysine-derived, N-ε-Boc protected amino acid derivative bearing an Nα-alkylidene substituent with a 4,4-dimethyl-2,6-dioxocyclohex-1-ylidene (cyclohexane-dione) motif. The structure retains the lysine side-chain primary amine as a Boc-protected functionality while presenting an additional chiral, stereodefined center at the lysine backbone that supports enantiopure peptide chemistry. The cyclohexane-dione-derived ylidene group introduces a carbonyl-rich, conjugated electrophilic handle that can participate in subsequent derivatization and can be used to tune reactivity and downstream intermediate formation. The molecule's protected amine and carboxyl functionality enable controlled peptide coupling strategies and orthogonal deprotection logic in synthetic sequences targeting lysine-containing peptides, peptidomimetics, and labeled or functionalized analogs.
1. Peptide Synthesis
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin supports peptide building-block workflows where lysine side-chain protection is required for selective N-terminal coupling. The N-ε-Boc group provides a removable amine handle for later lysine-specific amide formation, while the D-configuration at the α-carbon provides stereochemical fidelity for lysine incorporation into peptides and peptide fragments. The Nα-alkylidene substituent can be carried through coupling steps as a masked functionality, enabling controlled access to modified peptide termini or side-chain-adjacent motifs after deprotection or functional group transformation. The resulting lysine-containing intermediates can be applied to solid-phase or solution-phase peptide assembly, including synthesis of peptide analogs used in biochemical research and method development for amino acid derivative handling.
2. Peptidomimetics Development
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin is suitable for constructing peptidomimetic scaffolds that incorporate lysine-like spacing with carbonyl-rich functional elements. The cyclohexane-dione-derived ylidene group introduces multiple carbonyls that can be leveraged to create rigidified or electronically modulated linkages in synthetic analogs, while the Boc-protected ε-amine supports orthogonal functionalization relative to the α-position. The stereodefined lysine backbone enables consistent spatial presentation of amide bonds and side-chain chemistry, which is often required when generating structure-activity relationship (SAR) libraries of peptide-like molecules. Downstream derivatization of the carbonyl-bearing motif can support generation of additional heteroatom-containing substituents and constrained analogs for molecular design studies.
3. Chemical Biology Labeling
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin can be applied in chemical biology programs that require lysine-targeted modification chemistry with controlled reactivity. The protected ε-amine prevents premature side reactions during conjugation planning, while the carbonyl-rich ylidene substituent provides a chemically addressable site for subsequent activation or coupling to biomolecular scaffolds. The D-lysine stereochemistry can be maintained through synthetic steps to generate enantiopure probes, which helps reduce heterogeneity in peptide-based labeling reagents used for binding studies or assay development. The resulting modified amino acid or peptide derivatives can serve as intermediates for preparing conjugates, including affinity tags, detection reagents, and imaging-compatible peptide analogs.
4. Process Chemistry Intermediate
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin is relevant to process chemistry intermediate preparation where orthogonal protection and stable handling of functional groups are required. The Boc-protected lysine ε-amine supports predictable protection/deprotection sequencing, enabling manufacturing routes that separate lysine side-chain chemistry from α-position transformations. The carbonyl-rich cyclohexane-dione motif can function as a controllable intermediate handle for downstream conversion into other functional groups, supporting scalable synthesis of protected amino acid derivatives and specialized peptide building blocks. The compound's defined stereochemistry and protected amine architecture align with industrial fine chemical synthesis needs for reproducible intermediate quality in peptide manufacturing supply chains.
5. Analytical Reference Standards
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin can be employed in analytical research as a stereochemically defined amino acid derivative reference for method qualification and impurity profiling. The combination of Boc-protected ε-amine and the carbonyl-rich ylidene substituent produces characteristic chromatographic and spectroscopic signatures that can assist in tracking protected amino acid intermediates during synthesis and deprotection sequences. The D-lysine configuration provides enantiomer-specific discrimination when developing chiral HPLC or related analytical workflows for lysine-derived building blocks. The compound can also serve as a structural comparator for characterization of peptide coupling byproducts and for verifying conversion of protected amino acid forms into downstream peptide building blocks and conjugation-ready derivatives.
6. Side-Chain Functionalization
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-Boc-D-lysin supports side-chain functionalization strategies that begin with controlled lysine ε-amine masking. The N-ε-Boc group allows selective deprotection to reveal the primary amine for subsequent acylation, carbamate formation, or conjugation to electrophiles used in peptide modification workflows. The presence of the Nα-ylidene carbonyl motif can be leveraged to tune reactivity patterns, enabling sequential transformations where α-position modifications and ε-amine functionalization are temporally separated. The resulting functionalized lysine derivatives can feed into downstream peptide analog construction, bioconjugation intermediates, and synthetic methodology development focused on orthogonally protected amino acid chemistry.
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