(S)-α-Methyl-3-nitrophenylalanine·H2O is a stereodefined, non-proteinogenic amino acid derivative featuring an α-methyl substitution and a 3-nitrophenyl side chain, with both an amino group and a carboxyl group present as part of the amino acid framework. The molecule bears a nitro functionality on the aromatic ring, and the (S) stereochemical descriptor specifies the configuration at the α-carbon while the "·H2O" indicates association with water as a hydrate form. As an amino acid building block with a chemically distinctive aromatic nitro group and sterically modified α-position, it is used in peptide and analog synthesis, chemical biology labeling or conjugation strategies, and structure-activity or side-chain reactivity studies where the nitro-bearing aromatic motif and α-methyl constraint are relevant.
(S)-α-Methyl-3-nitrophenylalanine·H2O is a chiral, non-proteinogenic amino acid derivative featuring an α-methyl substitution and a 3-nitrophenyl side chain, supplied as a hydrate. The nitroaromatic functionality makes it a practical building block for chemical biology and medicinal chemistry workflows that require an aromatic nitro group, while the α-methyl stereocenter provides conformational and steric differentiation for peptide and peptidomimetic design. Researchers commonly use this compound as a defined chiral intermediate and residue analog to probe structure-activity relationships and to generate well-characterized standards for analytical and synthetic development.
1. Peptidomimetic Building Blocks
(S)-α-Methyl-3-nitrophenylalanine·H2O is used in peptide drug discovery and peptidomimetic development as a residue analog that introduces both steric bias (α-methyl) and a nitro-substituted aromatic side chain. Medicinal chemistry groups incorporate this building block into short peptide-like sequences to evaluate how side-chain electronics and backbone substitution affect conformational preferences and downstream chemical behavior during lead optimization. Because the material is supplied as a defined chiral amino acid hydrate, it is also frequently selected when consistent stereochemical identity and reproducible analytical characterization are required for SAR libraries and custom synthesis of nitroaromatic-containing analogs.
2. Structure-Activity Relationship Studies
(S)-α-Methyl-3-nitrophenylalanine·H2O supports SAR workflows in chemical biology and medicinal chemistry where nitroaromatic substitution is used as a structural probe. Researchers employ this compound to generate analog series that systematically vary aromatic substitution patterns and backbone substitution, enabling correlation of molecular structure with observed properties in biochemical assays or binding/interaction studies performed with the corresponding synthesized peptides or small molecules. The presence of the nitro group provides a convenient handle for comparative chemistry and for maintaining a consistent aromatic electronic motif across analog sets, while the (S)-configuration helps ensure that stereochemical effects on the modeled residue are controlled.
3. Pharmaceutical Intermediate Development
(S)-α-Methyl-3-nitrophenylalanine·H2O is also used as a chiral intermediate in the manufacturing and development of nitroaromatic-containing building blocks for pharmaceutical and specialty chemical synthesis. Process development teams and custom synthesis providers rely on defined stereochemistry and a stable, isolable amino acid framework to construct downstream fragments used in medicinal chemistry campaigns. The hydrate form is commonly handled as a reproducible starting material in intermediate preparation workflows where consistent mass balance and characterization are important for scale-up planning and for producing well-defined inputs to subsequent coupling or functionalization steps.
4. Analytical Reference Standards
(S)-α-Methyl-3-nitrophenylalanine·H2O is frequently prepared and used as an analytical reference for method development and quality control in LC-based workflows targeting nitroaromatic amino acid derivatives. Analytical chemists use the compound to validate retention behavior, confirm identity via chromatographic and mass spectrometric signatures, and support calibration or verification of synthetic intermediates during peptide and small-molecule synthesis. The defined stereochemistry and nitroaromatic functionality make it a useful standard when monitoring the presence and stability of α-methyl, 3-nitrophenyl-containing residues in complex reaction mixtures or final product characterization.
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