N-α-Fmoc-N-γ-4-methyltrityl-D-2,4-diaminobutyric acid is a protected, non-proteinogenic amino acid derivative featuring a 2,4-diaminobutyric acid backbone with two amino functionalities and a stereochemical designation of D at the α-carbon. The molecule bears an N-α Fmoc protecting group and an N-γ 4-methyltrityl (Mtt) protecting group, which mask the respective amino groups to control chemoselectivity during stepwise peptide assembly, while the remaining functional groups include a free carboxyl group and the unprotected amino functionality appropriate to the stated N-substitution pattern. In synthesis and chemical biology workflows, it is used as a protected building block for incorporating a diamino acid residue into peptides or peptide-related intermediates and for preparing structurally defined amino acid derivatives suitable for labeling, conjugation, or structure-activity studies.
CAT No: CP05332
N-α-Fmoc-N-γ-4-methyltrityl-D-2,4-diaminobutyric acid is an Fmoc-protected, chiral diamino acid derivative in which the α-amino group is masked by the fluorenylmethoxycarbonyl (Fmoc) protecting group and the γ-amino functionality is protected as a 4-methyltrityl (Mtt) carbocation-derived trityl ether/amine-protecting motif. The D-stereocenter at the 2-position and the two spatially separated amino groups create a defined, orthogonally protected scaffold for controlled peptide coupling and sequential deprotection. The molecule also contains a carboxylic acid handle that can be activated for amide bond formation while the protected amines remain inert under standard coupling conditions. The combination of a base-labile Fmoc group and a more selectively removable Mtt group supports stepwise functionalization strategies relevant to peptide chemistry, protected amino acid synthesis, and downstream intermediate preparation.
1. Peptide Synthesis
N-α-Fmoc-N-γ-4-methyltrityl-D-2,4-diaminobutyric acid is used as an orthogonally protected diamino acid building block for solid-phase peptide synthesis and related stepwise assembly workflows. The Fmoc group supports standard N-terminal protection during chain elongation, while the γ-amino group protected by 4-methyltrityl remains masked to prevent side reactions during peptide coupling at the α-position. The carboxylic acid functionality can be activated to form amide bonds, enabling incorporation of a D-configured 2,4-diaminobutyric residue into peptide backbones with controlled placement of the second amine for later elaboration. Sequential deprotection strategies allow conversion of the masked γ-amine into a reactive nucleophile for subsequent coupling, branching, or conjugation steps, supporting construction of multi-functional peptide architectures and peptide analog libraries.
2. Side-Chain Functionalization
N-α-Fmoc-N-γ-4-methyltrityl-D-2,4-diaminobutyric acid is applied in chemical biology and peptide engineering workflows that require controlled exposure of a latent side-chain amine. The protected γ-amino group provides a handle for orthogonal deprotection, enabling selective generation of a primary amine after peptide assembly or during fragment coupling sequences. The resulting free diamino motif can undergo targeted derivatization such as acylation, sulfonylation, alkylation, or attachment of linkers used for conjugation chemistry. The D-configuration and the fixed spacing of the two amino groups can influence local conformational preferences in peptidomimetics, making this intermediate suitable for structure-guided amino acid modification and downstream generation of functional peptide derivatives.
3. Bioconjugation Chemistry
N-α-Fmoc-N-γ-4-methyltrityl-D-2,4-diaminobutyric acid supports bioconjugation and biomolecule modification strategies where an orthogonally protected amine is needed for selective labeling. The Fmoc-protected α-amino group and Mtt-protected γ-amino group provide a protected diamino acid unit that can be incorporated into peptide scaffolds prior to conjugation steps, limiting uncontrolled crosslinking during earlier synthetic stages. Controlled deprotection can reveal a primary amine suitable for forming stable amide or urea linkages with activated carboxylic acids, isocyanates, or other electrophiles used in labeling chemistries. The chiral D-center and diamino spacing can help tune linker geometry and reactivity distribution in conjugates, enabling reproducible preparation of peptide-based probes, affinity tags, and modular conjugation intermediates for research-grade biomolecule engineering.
4. Process Chemistry Intermediate
N-α-Fmoc-N-γ-4-methyltrityl-D-2,4-diaminobutyric acid is relevant to process chemistry and fine chemical synthesis as a protected amino acid intermediate designed for scalable peptide building block preparation. The orthogonal protecting-group system, combining base-labile Fmoc removal with a distinct Mtt deprotection profile, supports manufacturing workflows that minimize side-product formation from competing amine reactivity during activation and coupling steps. The defined functional group set, including the carboxylic acid for activation and two protected amines for chemoselective unveiling, aligns with controlled intermediate handling and downstream conversion into peptide fragments or functionalized amino acid derivatives. The stereochemical integrity of the D-configured diamino acid can be preserved through protection and coupling sequences, making the compound suitable for industrial intermediate preparation where reproducible chiral building blocks are required.
5. Peptidomimetics And SAR Studies
N-α-Fmoc-N-γ-4-methyltrityl-D-2,4-diaminobutyric acid is utilized in peptidomimetic construction and structure-activity relationship studies that require incorporation of a diamino acid motif with programmable side-chain reactivity. The protected γ-amine enables late-stage functionalization after backbone assembly, allowing systematic variation of substituents attached to the second nitrogen while maintaining a consistent peptide-like scaffold. The Fmoc strategy supports controlled N-terminal chemistry, and the D-stereochemistry can be maintained to probe stereochemical effects on molecular recognition and conformational behavior in SAR workflows. Downstream derivatization of the exposed amine supports generation of analog series with different polarity, charge distribution, and linker chemistry, providing a practical route from protected amino acid chemistry to functional peptidomimetic intermediates for medicinal chemistry research.
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