L-2,3-Diaminopropionic acid is an amino acid derivative featuring a three-carbon backbone bearing two primary amino substituents at C-2 and C-3 and a terminal carboxylic acid, classifying it as a diamino-substituted amino acid rather than a standard proteinogenic residue. The molecule contains both an amino and a carboxyl functional group set, with the additional side-chain amino functionality providing multiple sites for protonation and for forming amide or other nitrogen-containing linkages under appropriate coupling conditions; the stereochemical designation "L" indicates the configuration at the chiral center present in the structure. In peptide and amide synthesis workflows, it can function as a building block that introduces an extra amino handle for subsequent derivatization, crosslinking chemistry, or incorporation into structured peptides and amino acid conjugates where additional nucleophilicity and branching of nitrogen functionality are required.
CAT No: CP05802
L-2,3-Diaminopropionic acid is an L-configured amino acid featuring a three-carbon backbone bearing a primary amino group at the α-position and an additional primary amino substituent at the β-position, together with a carboxylic acid functionality. The presence of two closely spaced amines and a stereogenic center enables strong, pH-dependent ionic character and distinct derivatization behavior relative to monoaminated amino acids. The diamine motif supports selective protection strategies, enabling orthogonal masking of either the α- or β-amine during peptide coupling or stepwise functionalization. As a chiral, diamino amino acid intermediate, it can be incorporated into peptide-like scaffolds or used to generate substituted diamines after conversion of the carboxyl group, supporting downstream synthetic utility in heterocycle formation and nitrogen-rich motif construction.
1. Peptide Coupling Building Block
L-2,3-Diaminopropionic acid is applied in peptide synthesis and related amide-bond construction workflows where a diamino side chain is required for charged or metal-binding peptide segments. The α-carboxylic acid and α-amine enable controlled conversion into a peptide-ready protected amino acid derivative, while the β-primary amine can be masked to prevent side reactions during coupling and subsequent deprotection. Orthogonal protection of the two amines can be used to tune chemoselectivity for sequential N-terminal or side-chain modifications after the peptide backbone is assembled. The resulting peptide building blocks and peptide analogs can be used to probe backbone-side-chain recognition, develop cationic peptide materials, and support synthetic methodology development for diamino amino acid incorporation.
2. Amino Acid Side-Chain Functionalization
L-2,3-Diaminopropionic acid is used for amino acid derivatization and side-chain functionalization strategies that exploit the dual primary amine handles for stepwise conjugation chemistry. The β-amine can undergo selective acylation, sulfonylation, carbamate formation, or reductive transformations after appropriate protection of the α-amine/carboxyl group, enabling attachment of linkers, affinity tags, or reactive groups for subsequent coupling. Carboxyl group activation and conversion to esters or amides can generate intermediates for further functional group interconversion while preserving the stereochemical integrity of the L-center. Downstream products include nitrogen-rich intermediates for biomolecule labeling, surface functionalization precursors, and scaffolds used in chemical biology and applied materials research.
3. Chiral Diamine Intermediate Synthesis
L-2,3-Diaminopropionic acid is applied as a chiral amino acid intermediate for stereodefined synthesis of substituted diamines and nitrogen-containing heterocycles. The L-configuration at the α-carbon provides a defined stereochemical bias that can be retained through carboxyl activation and conversion, followed by transformations of one or both amines into protected leaving-group equivalents or cyclization precursors. Selective protection and controlled deprotection enable formation of cyclic ureas, azacycles, or polyamine-like motifs via intramolecular nucleophilic substitution or condensation chemistry. The resulting chiral intermediates can serve in fine chemical synthesis, process chemistry development, and the preparation of building blocks for medicinal chemistry programs and agrochemical intermediate development where diamine functionality and stereocontrol are required.
4. Chemical Biology Conjugation Chemistry
L-2,3-Diaminopropionic acid is relevant to chemical biology and biomolecule modification workflows that require introduction of cationic or nucleophilic amine motifs into peptides, probes, or linkers. The dual primary amines can be selectively derivatized to generate conjugation-ready intermediates such as amine-reactive handles, protected amines for stepwise labeling, or chelator-like functionality when converted into coordination-capable derivatives. The carboxylic acid enables formation of amide or ester linkages to biomolecule scaffolds, while stereochemical definition helps maintain consistent physicochemical behavior in probe design. Downstream applications include construction of labeled peptide analogs, development of affinity reagents, and preparation of analytical or research reagents used to study binding interactions and molecular recognition.
5. Analytical Reference Standards
L-2,3-Diaminopropionic acid is utilized in analytical research as a stereochemically defined, diamino amino acid reference for method development and characterization of amino acid derivative mixtures. The presence of two primary amines and a carboxylic acid yields distinct derivatization and chromatographic behavior compared with monoamine amino acids, supporting calibration and identification in workflows such as amino acid profiling, hydrolysate analysis, and stability monitoring of protected amino acid intermediates. Protection-group-aware analytical strategies can be implemented by converting the compound into defined derivatives that improve detectability and separation. The compound can also function as a structural standard for verifying derivatization completeness and for supporting quality control of peptide synthesis intermediates containing diamino side chains.
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