2-Amino-D-tryptophan contains the indole-bearing amino acid skeleton of tryptophan with an amino group positioned at the 2-position of the side-chain-substituted framework and a free carboxylic acid, classifying it as a D-configured, nonstandard tryptophan analogue. The molecule bears the indole aromatic ring as a side-chain functionality for hydrophobic and π-interactions, while the amino and carboxyl groups provide complementary sites for salt formation and peptide-bond formation under coupling conditions. It is used in peptide chemistry and chemical biology as a structurally defined tryptophan derivative for incorporation studies, structure-activity comparisons, and analytical method development where an amino acid with D-configuration and altered substitution pattern is required.
CAT No: CP24502
2-Amino-D-tryptophan is a D-stereochemical tryptophan analog featuring the indole-containing aromatic side chain typical of tryptophan, paired with an amino-functionalized backbone suitable for incorporation into synthetic sequences. This chiral, non-proteinogenic amino acid building block is used in chemical biology and medicinal chemistry workflows where stereochemistry and indole functionality are important for downstream structure-activity relationship studies, peptide-like scaffold assembly, and analytical method development. Its defined D-configuration supports the preparation of stereochemically controlled analogs for conformational and binding studies.
1. Peptidomimetic Building Blocks
2-Amino-D-tryptophan is used by medicinal chemistry and peptide-chemistry groups to construct peptidomimetic or peptide-like scaffolds containing a stereodefined D-tryptophan residue. The indole side chain provides a chemically recognizable aromatic motif for studying aromatic interactions and aromatic-driven conformational preferences in sequence-defined analogs. Researchers commonly employ this building block when they need a D-amino acid variant to probe stereochemical effects on structure, stability, and structure-activity relationships during lead optimization. In practice, it is incorporated into custom synthesized oligomers and analog libraries where precise residue identity and stereochemistry are required for meaningful SAR comparisons.
2. Chemical Biology Probe Precursors
2-Amino-D-tryptophan serves as an indole-containing amino acid precursor for chemical biology probe construction, especially when a tryptophan-like aromatic handle is desired for downstream labeling or detection strategies. Teams developing binding probes, affinity reagents, or assay reagents often select D-stereochemistry to generate stereochemically distinct analogs that can help differentiate binding modes or reduce confounding effects from stereoisomer mixtures. The indole functionality supports conjugation strategies that rely on aromatic side-chain chemistry in the final probe architecture, while the amino-functionalized backbone enables controlled incorporation into probe scaffolds. This makes the reagent useful for workflows that require consistent, sequence-defined probe materials for screening and mechanistic studies.
3. Stereochemical SAR Intermediates
2-Amino-D-tryptophan is widely applied as a stereochemically defined intermediate for preparing D-tryptophan-containing analogs used in structure-activity relationship and conformational studies. Organic and medicinal chemistry teams use it to generate matched series of analogs that differ specifically at the stereocenter, allowing direct assessment of how D-configuration influences overall scaffold geometry and physicochemical behavior. The indole side chain provides a consistent aromatic feature across analog sets, which helps isolate the impact of stereochemistry on downstream properties. Such intermediates are commonly used during iterative synthesis of small-molecule or oligomeric candidates, where maintaining strict stereochemical control is essential for interpretable SAR outcomes.
4. Analytical Reference Materials
2-Amino-D-tryptophan is also used to prepare stereochemically defined standards and reference materials for analytical workflows that distinguish tryptophan stereoisomers or indole-containing amino acid analogs. Analytical chemistry laboratories and method-development teams rely on defined D-configuration building blocks to support LC-MS and related quantitation workflows that require accurate retention-time and mass-based reference behavior for D-amino acid species. This reagent is particularly relevant when developing assays for amino acid analogs, monitoring synthetic reaction outcomes, or validating separation performance for stereoisomeric mixtures. By providing a defined stereochemical target, it helps ensure that analytical comparisons between stereoisomeric compounds are grounded in well-characterized reference material.
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