2,3-Dimethy-L-Phenylalanine is a non-proteinogenic, stereochemically specified amino acid derivative of phenylalanine bearing two methyl substituents at the 2- and 3-positions of the aromatic ring while retaining the amino acid backbone. It contains a free amino group and a free carboxyl group and presents an L-configuration at the alpha carbon, with the substituted phenyl side chain providing increased hydrophobicity and altered steric and electronic character relative to unsubstituted phenylalanine. In peptide and chemical biology research, this molecule is used as a defined building block to introduce ring-substituted phenylalanine analogues for structure-activity studies, conformational or binding investigations, and the synthesis of peptides with modified side-chain properties.
CAT No: CP13801
2,3-Dimethy-L-Phenylalanine is a sterically constrained, non-proteinogenic phenylalanine analog featuring two methyl substituents at the 2- and 3-positions of the aromatic ring, provided in the L-configuration. This substitution pattern increases side-chain bulk and perturbs aromatic electronics and packing, making it a valuable chiral amino acid building block for peptide and peptidomimetic design where conformational and steric effects are important. Researchers commonly use this amino acid to probe structure-activity relationships and to tune properties of aromatic side-chain-containing sequences in medicinal chemistry and chemical biology workflows.
1. Peptidomimetic Building Blocks
2,3-Dimeth-L-Phenylalanine is used as an amino acid building block for incorporating a sterically demanding, ring-substituted aromatic side chain into peptides and peptidomimetics during custom peptide synthesis. Medicinal chemistry groups and peptide development teams rely on this analog to introduce controlled steric bulk at the phenyl ring, supporting SAR studies focused on how aromatic substitution impacts local conformation, hydrophobic surface presentation, and overall sequence behavior. Because the compound is supplied in the L-configuration, it is commonly selected when researchers want stereochemically defined incorporation consistent with typical amino acid stereochemistry in peptide analog libraries.
2. Structure-Activity Relationship Studies
2,3-Dimeth-L-Phenylalanine is frequently chosen for SAR and lead-optimization campaigns that compare aromatic substitution patterns and their effects on molecular recognition in chemical biology and medicinal chemistry research. By using a dimethyl-substituted phenylalanine analog, researchers can systematically vary aromatic size and steric profile while keeping the amino acid backbone stereochemistry fixed, enabling more informative comparisons across peptide or peptidomimetic series. This makes the reagent particularly useful for designing analog panels where changes in aromatic ring substitution are the primary variable, supporting downstream evaluation of binding-site geometry and interaction patterns in assay development workflows.
3. Protein Interaction Probing
2,3-Dimeth-L-Phenylalanine is applied in chemical biology contexts where aromatic side-chain perturbation is used to map or modulate protein-ligand and protein-peptide interaction landscapes. Investigators often incorporate this non-natural amino acid into peptide probes to test how increased aromatic sterics and altered ring character influence contact geometry and interaction persistence within a protein interface. Such probe design is commonly used in studies that require rational modification of peptide character without introducing reactive handles, relying instead on the structural impact of the 2,3-dimethylphenyl motif to generate interpretable differences across probe variants.
4. Chiral Intermediate Development
2,3-Dimeth-L-Phenylalanine serves as a chiral, stereochemically defined intermediate for downstream synthesis of specialized amino acid derivatives and substituted aromatic building blocks used in research-grade chemical manufacturing. Process and development chemists use this L-configured scaffold as a starting point when they need a defined chiral aromatic amino acid motif to construct further functionalized analogs for peptide-related programs, including analog libraries and intermediate streams feeding medicinal chemistry synthesis. The rigid, ring-substituted aromatic framework provides a practical handle for building higher-complexity structures while maintaining stereochemical control from the amino acid stage.
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