Methoxycarbonyl-Lys(Z)-OH · DCHA

Methoxycarbonyl-Lys(Z)-OH · DCHA is a protected lysine derivative presented as a salt with dicyclohexylamine, featuring a methoxycarbonyl (carbamate/ester-type) functionality at the α-carboxyl region and a Z (benzyloxycarbonyl, Cbz) protecting group on the lysine ε-amino side chain. The molecule retains the stereodefined lysine backbone with a chiral center at the α-position, while the protected ε-amine suppresses competing side reactions during peptide coupling and enables selective deprotection logic. The Z-protected side chain and the amino acid carboxyl functionality together provide a controlled reactivity profile for stepwise peptide assembly, side-chain functionalization after orthogonal deprotection, and downstream conversion into activated coupling partners. Salt formation with DCHA can influence handling properties and crystallization behavior, supporting reproducible intermediate preparation in synthetic and process-oriented workflows.

1. Peptide Synthesis

Methoxycarbonyl-Lys(Z)-OH · DCHA supports peptide building block preparation for solid-phase or solution-phase assembly where lysine side-chain protection is required to maintain chemoselectivity. The Z-protected ε-amine and the protected α-carboxyl functionality enable sequential coupling at the intended termini while minimizing undesired ε-amide formation during early steps. Deprotection of the Z group can be applied to regenerate the lysine side-chain amine for subsequent elongation, branching, or orthogonal conjugation. The resulting lysine-containing peptides and peptide fragments can be used for mapping sequence-dependent properties in biochemical research and for manufacturing peptide intermediates in industrial fine chemical synthesis.

2. Side-Chain Functionalization

Methoxycarbonyl-Lys(Z)-OH · DCHA is suitable for side-chain functionalization workflows where the ε-amino group is masked during initial derivatization planning and then unmasked under orthogonal conditions. The Z protecting group provides a stable handle for protecting-group strategy design, allowing controlled introduction of amide, urea, sulfonamide, or linker chemistries after selective deprotection. The lysine stereochemistry and terminal functional groups help preserve defined spatial geometry for downstream conjugation chemistry, including generation of functionalized lysine residues for peptide analogs and biomolecule scaffolds. The compound can therefore serve as a chiral intermediate for constructing labeled or tethered lysine derivatives used in chemical biology and applied materials research.

3. Bioconjugation Chemistry

Methoxycarbonyl-Lys(Z)-OH · DCHA can be used in bioconjugation chemistry as a protected lysine precursor for generating amine-reactive or amine-bearing conjugation motifs with controlled stoichiometry. The Z-protected ε-amine allows preparation of conjugatable lysine units without premature reaction with electrophiles during intermediate synthesis. Selective deprotection can generate a free ε-amino handle for coupling to activated esters, isothiocyanates, aldehydes, or carbonyl-based linkers under conditions compatible with peptide and protein substrates. Downstream conjugates derived from lysine residues can be applied to biomolecule labeling, affinity reagent construction, and analytical probe preparation where defined lysine geometry and protection strategy are critical.

4. Process Chemistry Intermediate

Methoxycarbonyl-Lys(Z)-OH · DCHA fits process chemistry intermediate preparation for manufacturing routes that require protected amino acid derivatives with predictable reactivity and minimized side reactions. The Z group on the ε-amino functionality provides a robust protection element during activation, coupling, and purification steps, supporting reproducible formation of peptide intermediates. Salt formation with DCHA can be leveraged to improve handling characteristics and crystallization control for scale-up, while the methoxycarbonyl-protected carboxyl region supports controlled conversion into downstream coupling-ready forms. The compound can be employed as a standardized chiral lysine building block in specialty chemical production and pharmaceutical intermediate supply chains focused on peptide-grade synthesis.

5. Analytical Standards And SAR Studies

Methoxycarbonyl-Lys(Z)-OH · DCHA can serve as an analytical reference and SAR-oriented intermediate for characterizing lysine-containing peptide fragments and protected amino acid derivatives. The defined stereochemistry and the orthogonally protected ε-amine enable preparation of well-characterized standards that distinguish coupling-site integrity, protecting-group stability, and deprotection outcomes by chromatographic and spectrometric methods. The methoxycarbonyl and Z-protected functionalities support generation of defined derivatives for method development, impurity profiling, and structural confirmation during peptide analog optimization. Lysine-based intermediates derived from this compound can also support structure-activity relationship studies by enabling consistent synthesis of analog panels where side-chain protection and deprotection control are essential for reproducible comparisons.

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