N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid is a protected, non-proteinogenic amino acid derivative featuring an L-2,4-diaminobutyric acid backbone bearing an N-α Boc protecting group and an N-γ substituted side-chain that includes a 4,4-dimethyl-2,6-dioxocyclohex-1-ylidene (cyclohexane-dione-derived) moiety. The molecule contains a free carboxyl group and multiple amino functionalities, with chemoselectivity and reactivity modulated by Boc protection at the α-nitrogen and by the bulky, carbonyl-rich cyclic ylidene substituent at the γ-nitrogen, while the amino acid stereochemistry is specified only at the L-configuration indicated in the name. In synthesis and chemical biology workflows, this protected diamino acid derivative can function as a stepwise building block for preparing more complex amino acid and peptide-like structures, where the protected α-amino group and controlled side-chain substitution help manage side reactions during coupling and subsequent deprotection strategies.
CAT No: CP05312
N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid is a protected L-2,4-diaminobutyric acid derivative bearing an N-terminal Boc carbamate and an additional amino functionality masked by a chiral, cyclic enone-like acylidene motif (4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl. The molecule contains a stereogenic center at the side-chain carbon adjacent to the masked nitrogen, and it presents a carboxylic acid suitable for peptide coupling after activation. The combination of a Boc-protected amine and a second nitrogen protected as an acylidene-derived group supports orthogonal deprotection strategies, enabling stepwise construction of peptide-like scaffolds. The embedded cyclohexane dione-derived moiety is chemically robust yet can serve as a controlled protecting group element during synthetic sequences, making the compound relevant to protected amino acid synthesis and downstream derivatization workflows.
1. Protected Amino Acid Synthesis
N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid is applied in protected amino acid synthesis where orthogonal nitrogen protection is required for multi-amino acid assembly. The N-terminal Boc group provides a predictable carbamate deprotection handle, while the γ-nitrogen is protected by the 4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl acylidene-type functionality, allowing controlled exposure of the diamino backbone in later steps. The free carboxylic acid functionality enables conversion into peptide coupling-ready derivatives, supporting sequential installation of protected residues without premature cross-reactivity. The resulting intermediate can be used to prepare defined diamino acid building blocks for peptide construction, chiral auxiliary removal sequences, and protected scaffold elaboration in fine chemical synthesis.
2. Peptide Coupling Chemistry
N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid serves as a peptide building block for coupling strategies targeting diamino acid incorporation into peptide chains. The molecule's carboxylic acid and protected amine set allow formation of amide linkages while maintaining chemoselectivity toward the intended reactive nitrogen during peptide coupling cycles. The stereogenic center adjacent to the masked side-chain nitrogen supports stereochemically defined residue placement, which is relevant for peptide analogs where side-chain geometry influences conformational behavior. Orthogonal protection enables stepwise peptide elongation followed by selective deprotection to reveal functional diamino motifs for subsequent derivatization, including formation of side-chain substituted peptides and constrained peptidomimetic frameworks.
3. Chemical Biology Labeling
N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid is used in chemical biology workflows that require protected diamino acid incorporation prior to conjugation chemistry. The protected amines can be carried through peptide assembly or scaffold synthesis, then selectively unveiled to generate primary amine handles for nucleophilic coupling to activated esters, aldehydes, or electrophilic labeling reagents. The presence of a stereodefined amino acid backbone can help maintain binding-relevant spatial arrangement in peptide-based probes used for receptor mapping, protein interaction studies, or pathway perturbation tool development. Downstream, the diamino functionality can be transformed into secondary amines, guanidinium-like motifs, or amide-linked conjugates, supporting preparation of labeled biomolecule fragments and research-grade conjugates.
4. Peptidomimetics And SAR Studies
N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid is suitable for peptidomimetic construction in structure-activity relationship studies where controlled side-chain presentation is required. The protected diamino acid core enables incorporation of a defined, stereochemically constrained residue into peptide analogs that mimic cationic or hydrogen-bonding patterns of natural amino acids. The Boc-protected N-terminus and the orthogonally masked γ-nitrogen facilitate iterative synthesis of analog series, supporting systematic variation of side-chain substituents after selective deprotection. The resulting analogs can be further functionalized to tune polarity, charge distribution, and intramolecular hydrogen bonding, which is relevant for SAR-driven optimization of molecular recognition scaffolds in medicinal chemistry research.
5. Process Chemistry Intermediate
N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid is employed as a process chemistry intermediate for manufacturing routes that require protected amino acid building blocks with predictable deprotection logic. The Boc carbamate offers a robust protection element during coupling and purification operations, while the additional acylidene-derived nitrogen protection can be selected to withstand conditions used in peptide coupling sequences until the targeted unveiling step. The carboxylic acid group provides a handle for conversion to activated forms used in stepwise assembly, enabling scalable preparation of defined peptide fragments and protected diamino acid derivatives. Industrially relevant downstream uses include preparation of specialty chemical intermediates for peptide-based materials, research reagents for biochemical workflows, and chiral building blocks used in controlled stereochemical synthesis.
6. Analytical Standards Development
N-α-Boc-N-γ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-2,4-diaminobutyric acid can be used to develop analytical standards and reference materials for monitoring protected amino acid synthesis and peptide coupling performance. The presence of multiple nitrogen functionalities with distinct protection states supports generation of well-defined fragmentation patterns and retention behaviors in LC-MS and related analytical methods, aiding identification of intermediates and confirmation of deprotection completeness. The stereogenic center and rigid dione-derived acylidene motif can improve discriminability between diastereomeric or partially deprotected species encountered during multi-step syntheses. Downstream, the compound can serve as a structural reference for method validation in peptide manufacturing development, supporting quality control of protected amino acid incorporation and subsequent derivatization steps.
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