2,3-Dimethy-D-Phenylalanine is a non-proteinogenic, stereochemically specified phenylalanine derivative bearing a D-configured alpha-amino acid framework with a phenyl side chain substituted by two methyl groups at the 2 and 3 positions. The molecule contains a free amino group and a carboxyl group appropriate for amino-acid coupling chemistry, while the additional methyl substituents increase steric bulk around the aromatic side chain and modulate hydrophobic and conformational preferences relative to unsubstituted phenylalanine. In peptide and structure-activity studies, it functions as a chemically defined building block for introducing a substituted aromatic residue to probe effects of side-chain substitution on peptide conformation, binding interactions, and labeling or analytical characterization of peptide analogues.
CAT No: CP13802
2,3-Dimethy-D-Phenylalanine is a D-configured, non-proteinogenic phenylalanine analog featuring two methyl substituents at the 2- and 3-positions of the aromatic ring. This sterically and electronically modified amino acid building block is used in peptide and peptidomimetic development to probe structure-property relationships and to introduce conformational or steric effects at specific positions. As a chiral, non-natural amino acid, it is typically handled as a defined stereochemical reagent for downstream coupling into synthetic sequences rather than as a metabolically native amino acid.
1. Peptidomimetic Building Block
2,3-Dimethy-D-Phenylalanine is used by medicinal chemistry and peptide drug discovery teams as a non-natural amino acid building block for incorporating a sterically hindered, ring-substituted residue into peptidomimetics. Its D-configuration supports the synthesis of stereochemically defined analogs used in structure-activity relationship (SAR) studies, where researchers evaluate how backbone stereochemistry and aromatic substitution influence overall properties such as local conformation and physicochemical behavior. In practice, it is commonly selected for sequence design where aromatic bulk at the side chain is expected to modulate interactions and improve the stability profile of synthetic peptides in chemical biology workflows, without relying on proteinogenic residue behavior.
2. Protease Resistance Studies
2,3-Dimethy-D-Phenylalanine is frequently incorporated into short peptide substrates and analog panels used in chemical biology to assess proteolytic processing patterns. Researchers use D-amino acid content and bulky aromatic substitution to create defined test sequences that help distinguish the contribution of stereochemistry and side-chain sterics to cleavage susceptibility. This makes the residue useful for generating comparative datasets in enzyme assay development, where the goal is to understand how specific non-natural modifications alter degradation trends across a panel of related substrates.
3. SAR and Conformational Probing
2,3-Dimethy-D-Phenylalanine supports SAR and conformational probing efforts in peptide and peptidomimetic optimization programs, particularly when aromatic substitution is used as a handle to tune steric environment and aromatic electronics. Synthetic chemists and materials-focused peptide researchers incorporate this residue into analog series to map how changes at the phenyl ring affect folding propensities, local packing, and overall molecular shape in solution. The defined D-stereochemistry further enables systematic comparison against L- or other stereoisomeric analogs, supporting rational design of sequence variants for downstream binding or functional readouts in research settings.
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