N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is a protected, amino acid derivative in which the amino acid backbone is substituted with a side-chain diamine and bears an Fmoc group on the α-nitrogen while the γ-amino functionality is protected as a 4-methyltrityl (Mtt) carbamate/benzhydryl-type protecting group. The molecule contains a free carboxyl group and two nitrogen-containing side-chain functionalities, with stereochemistry indicated as L at the α-carbon, enabling chemoselective handling of the α-amino and γ-amino sites during stepwise assembly. In peptide chemistry and chemical biology workflows, it functions as a protected building block for incorporating 2,4-diaminobutyric acid residues with controlled orthogonality, supporting the preparation of peptides or peptide-related intermediates bearing diamine side chains for subsequent conjugation, labeling, or further functionalization.
CAT No: CP05333
N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is an Fmoc-protected, chiral amino acid derivative in which the α-amino group is masked by the base-labile Fmoc carbamate and the γ-amino group is protected as a 4-methyltrityl (Mtt) ether-type protecting group. The molecule contains a stereogenic center at the α-carbon and a side chain bearing two amino functionalities overall, enabling orthogonal chemoselectivity between N-terminal deprotection and side-chain unmasking. The presence of the bulky, acid-labile Mtt group and the aromatic Fmoc chromophore supports controlled peptide coupling workflows, while the diamino side chain can be further transformed into guanidinium-like or amide/urea motifs after selective deprotection. The compound's protected amines and carboxyl functionality make it a practical intermediate for peptide building block preparation and downstream derivatization in synthetic and biochemical chemistry.
1. Peptide Synthesis
N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is used as a protected peptide building block in automated and manual solid-phase peptide synthesis workflows. The Fmoc group controls N-terminal incorporation by enabling base-mediated deprotection at the growing chain, while the γ-Mtt protection maintains orthogonality by suppressing side-chain amine reactivity during coupling cycles. The diamino side chain architecture supports incorporation of this residue into peptide sequences where selective side-chain functionalization is required after assembly, including access to additional nucleophilic sites for later conjugation or crosslinking. The resulting peptide analogs can be used as research-grade substrates for studying amino acid side-chain recognition and for constructing polyamine-like motifs that influence folding and binding behavior.
2. Side-Chain Functionalization
N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is applied in amino acid derivatization strategies that rely on orthogonal protection of two nitrogen atoms. The Mtt-protected γ-amine can be unmasked under conditions compatible with Fmoc chemistry, allowing selective introduction of functional groups such as amide, urea, sulfonamide, or carbamate derivatives at the side chain. The remaining protected α-amino functionality supports sequential transformations that preserve peptide coupling compatibility when the residue is used as an intermediate for longer constructs. Downstream use includes generating functionalized diamino building blocks for chemical biology probes, linker units for bioconjugation, and intermediate scaffolds for peptidomimetic construction.
3. Chemical Biology Probes
N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is suitable for chemical biology research where controlled installation of a polyamine-like side chain improves molecular recognition and labeling chemistry. The protected diamino side chain enables stepwise conjugation design, with orthogonal deprotection strategies allowing attachment of fluorophores, affinity tags, or reactive handles at a defined position within a peptide or peptidomimetic scaffold. The Fmoc handle supports incorporation into labeled peptides while limiting premature side reactions from the second amine during synthesis and purification. The resulting labeled or functionalized biomolecular tools can be employed to interrogate binding interfaces, assess internalization or trafficking mechanisms at the molecular level, and generate structure-defined probes for biochemical assays.
4. Peptidomimetics And SAR Studies
N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is utilized in peptidomimetic construction and structure-activity relationship studies that require defined stereochemistry and side-chain nitrogen patterning. The chiral α-center and the protected γ-amine support consistent spatial presentation of cationic or hydrogen-bonding functionalities after deprotection and derivatization. The ability to convert the side-chain amine into constrained or acylated analogs enables systematic variation of charge density, polarity, and hydrogen-bond donor/acceptor profiles across analog series. The compound thereby serves as an amino acid-based intermediate for generating SAR libraries of peptide-like scaffolds designed to probe how diamino substitution patterns affect molecular interactions.
5. Pharmaceutical Intermediate Preparation
N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is relevant to pharmaceutical intermediate preparation where orthogonally protected amino acid derivatives support scalable synthesis of peptide-derived ingredients and process intermediates. The Fmoc carbamate and Mtt-protected γ-amine provide a protection strategy that can be mapped onto manufacturing route design, enabling selective deprotection and functional group installation without uncontrolled cross-reactivity of the diamino side chain. The carboxyl functionality and protected amines allow conversion into activated coupling partners or incorporation into longer sequences under peptide-compatible conditions. The resulting intermediates can be used for downstream synthesis of defined peptide fragments, linker-containing molecules, or analytical reference materials used during process development and quality characterization.
6. Process Chemistry And Fine Chemical Synthesis
N-α-Fmoc-N-γ-4-methyltrityl-L-2,4-diaminobutyric acid is applicable in process chemistry and fine chemical synthesis as a chiral, orthogonally protected amino acid intermediate. The acid-labile Mtt group and base-labile Fmoc group enable chemoselective transformations that can be sequenced to control which nitrogen participates in derivatization at each stage, reducing side-product formation from the diamino side chain. The bulky protecting group behavior of 4-methyltrityl can be leveraged to moderate reactivity during coupling and purification steps, while maintaining access to the γ-amine for later conversion into amide-forming or conjugation-ready derivatives. The compound's structure supports manufacturing-oriented synthesis planning for amino acid functionalization, peptide building block preparation, and generation of stereochemically defined intermediates for specialty chemical production.
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