N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-allyoxycarbonyl-L-lysine is a protected L-lysine derivative in which the α-amino group and the ε-amino side chain are masked, and the α-carboxylate is incorporated into a cyclic "ylidene" acyl/auxiliary structure. The molecule contains an α-carboxyl functional unit rendered as part of the 4,4-dimethyl-2,6-dioxocyclohex-1-ylidene moiety, while the ε-amino group is protected as an allyoxycarbonyl (Alloc) carbamate, leaving the side chain otherwise bearing the lysine carbon skeleton; the name specifies the L configuration for the lysine framework. In peptide and amino-acid derivative synthesis, such orthogonally protected lysine analogues are used as stepwise building blocks in solid-phase or solution-phase strategies, where the Alloc-protected ε-amino group provides chemoselective control of side-chain functionalization during sequential coupling and deprotection workflows.
CAT No: CP01430
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-allyoxycarbonyl-L-lysine is a protected L-lysine derivative bearing an Nα-alkylidene auxiliary and an Nε-allyloxycarbonyl (Alloc) protecting group on the side-chain amine. The lysine backbone provides a stereogenic α-carbon in the L-configuration, while the Nα substituent incorporates a cyclic dione-derived acylidene functionality that can function as a temporary nitrogen-protecting and stereocontrolling element during peptide assembly. The Alloc group introduces an allyl carbonate that can be removed under orthogonal conditions, leaving the lysine ε-amine available for amide bond formation or further derivatization. The combination of protected amine sites and the rigidified Nα environment makes the compound a peptide-compatible chiral intermediate for constructing lysine-containing sequences and for downstream functional group transformations.
1. Peptide Synthesis
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-allyoxycarbonyl-L-lysine supports peptide coupling workflows where lysine ε-amide formation is required with controlled orthogonality. The molecule contains a protected ε-amine as an allyoxycarbonyl carbonate, enabling selective deprotection to regenerate the nucleophilic lysine side-chain for subsequent coupling steps. The Nα-alkylidene auxiliary and the protected nitrogen framework can be employed to manage chemoselectivity and stereochemical integrity during sequential N-terminal and side-chain functionalization. Alloc deprotection followed by standard amide coupling can yield lysine-containing peptide building blocks and protected peptide fragments used in peptide library construction and synthesis planning. The compound's dual protection pattern aligns with peptide chemistry strategies that separate Nα and Nε reactivity across iterative synthesis cycles.
2. Side-Chain Functionalization
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-allyoxycarbonyl-L-lysine is suited to side-chain functionalization programs that require controlled access to the lysine ε-amine. The Alloc group masks the ε-nucleophile during manipulations, while orthogonal removal can expose the primary amine for conversion into urea, amide, sulfonamide, carbamate, or other nitrogen-linked derivatives. The lysine stereocenter and protected backbone help maintain structural fidelity when generating analogs for chemical biology probes, enzyme substrate variants, or peptidomimetic scaffolds. The rigid Nα auxiliary may also influence conformational presentation during intermediate formation, supporting reproducible downstream derivatization sequences. Lysine ε-functionalization derived from this compound can feed into structured molecular designs where side-chain chemistry drives binding and reactivity.
3. Bioconjugation Chemistry
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-allyoxycarbonyl-L-lysine can be applied in bioconjugation development where lysine-based amide or carbamate linkages are formed under controlled protection strategies. The protected ε-amine allows compatibility with multi-step synthesis of conjugatable handles, including post-deprotection coupling to activated carboxylic acids, activated esters, or isocyanate-derived linkers. The orthogonal Alloc protection supports sequential installation of conjugation motifs without premature reaction of the ε-nitrogen, which is relevant when preparing defined conjugates for biochemical assays or material-binding studies. The Nα-protected lysine framework can serve as a chiral intermediate that preserves stereochemical identity through linker installation and subsequent peptide or polymer assembly. Downstream conjugate generation from this lysine derivative supports reproducible construction of amine-reactive biomolecular tools and labeled peptide analogs.
4. Peptidomimetics And SAR Studies
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-allyoxycarbonyl-L-lysine is relevant to peptidomimetic construction and structure-activity relationship (SAR) studies requiring lysine-containing analogs with controlled functional-group placement. The molecule provides a defined lysine ε-amine protected as an allyloxycarbonyl carbonate, enabling systematic variation of side-chain chemistry after selective deprotection and derivatization. The Nα auxiliary and protected nitrogen architecture can be leveraged to maintain consistent stereochemical and electronic features across analog series during fragment coupling and scaffold elaboration. The resulting lysine derivatives can be incorporated into peptide mimics, constrained amide linkages, or side-chain-modified scaffolds used to probe binding determinants and conformational effects. Chiral amino acid intermediate preparation from this compound supports iterative SAR workflows in medicinal chemistry and chemical biology development.
5. Pharmaceutical Manufacturing Intermediates
N-α-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-N-ε-allyoxycarbonyl-L-lysine can serve as a process chemistry intermediate for manufacturing lysine-containing peptide intermediates and protected amino acid building blocks. The presence of an Alloc-protected ε-amine supports orthogonal protection logic that can be integrated into scalable synthetic routes, where selective deprotection enables downstream coupling to activated acyl components. The Nα-alkylidene protected framework provides a defined nitrogen protection strategy that may reduce side reactions during peptide bond formation steps and intermediate handling. The compound's chiral lysine backbone makes it suitable for producing stereochemically consistent intermediates for further purification and conversion into higher-order peptide structures. Industrially, this type of protected amino acid derivative aligns with fine chemical production requirements for controlled functional group availability and reliable downstream transformation to peptide-grade materials.
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