2,5-Dimethy-L-Phenylalanine is an L-phenylalanine derivative in which the phenyl side chain bears two methyl substituents at the 2- and 5-positions, making it a non-standard, sterically modified aromatic amino acid. The molecule contains a free amino group and a free carboxyl group alongside a hydrophobic, substituted benzyl side chain, and the L stereochemical designation indicates the configuration at the α-carbon. It is used in peptide and structure-activity studies where altered aromatic sterics and hydrophobic character are introduced into peptide backbones or amino acid analog libraries to probe effects on folding, binding, or analytical behavior.
CAT No: CP14001
2,5-Dimethy-L-Phenylalanine is a sterically and electronically modified phenylalanine analog featuring two methyl substituents at the 2- and 5-positions of the aromatic ring. As an L-amino acid building block, it is commonly used to introduce increased hydrophobic character and side-chain bulk into peptide and peptidomimetic structures, supporting structure-property studies in chemical biology and medicinal chemistry. Its nonstandard aromatic substitution pattern makes it particularly useful when researchers need to probe how aryl ring substitution influences conformation, local packing, and downstream chemical behavior during peptide assembly.
1. Peptide Building Block
2,5-Dimethy-L-Phenylalanine is used as a non-natural amino acid building block for custom peptide synthesis where aromatic ring substitution is a key design variable. Peptide chemists and medicinal chemistry teams incorporate this residue to tune hydrophobicity and steric profile at the side chain, enabling SAR-style comparisons across peptide series. The L-configuration supports consistent stereochemical outcomes in peptide coupling workflows, while the dimethyl-substituted phenyl ring provides a distinct physicochemical signature compared with unsubstituted phenylalanine. This makes the reagent valuable for generating analog libraries for binding-site mapping, conformational studies, and structure-activity relationship investigations in lead optimization programs.
2. Peptidomimetic SAR Studies
2,5-Dimethy-L-Phenylalanine supports peptidomimetic development by providing a defined aromatic substitution pattern that can affect how a pharmacophore is presented in constrained peptide-like scaffolds. Researchers in chemical biology and medicinal chemistry use this residue to systematically vary aryl substitution density and steric demand while keeping the backbone framework comparable across analogs. Such design control is particularly useful when the aromatic side chain is intended to drive hydrophobic contacts or shape local microenvironments within a binding pocket. By enabling targeted substitution of a single residue position, this building block helps teams generate chemically comparable series for interpreting structure-property relationships without changing the overall peptide backbone architecture.
3. Protein Interaction Probing
2,5-Dimethy-L-Phenylalanine is applied in chemical biology workflows that require site-specific incorporation of a modified aromatic side chain to study protein-ligand or protein-protein interaction determinants. When used in peptide probes, it can help researchers evaluate how increased aryl bulk and altered ring substitution influence interaction geometry and local packing at the interface. This approach is commonly used in mechanistic studies with synthetic peptides that mimic binding motifs, where the residue-level chemical identity is intentionally varied to isolate contributions from side-chain chemistry. The dimethyl-substituted phenyl group provides a practical handle for generating probe sets that differ in steric and hydrophobic character while maintaining a consistent peptide context.
4. Medicinal Chemistry Intermediates
2,5-Dimethy-L-Phenylalanine is also used as a pharmaceutical intermediate building block for downstream synthesis of substituted amino acid derivatives and peptide-like fragments. Process and synthesis chemists leverage the defined L-amino acid framework to prepare specialized intermediates for medicinal chemistry programs, including analogs where aromatic substitution must be retained through subsequent functional-group transformations. The rigid, substituted phenyl ring provides a stable structural motif that can be carried forward into larger scaffolds, supporting development of aryl-rich fragments used in iterative library synthesis. This makes the compound relevant for teams building non-natural residue variants and related intermediates for structure-guided lead optimization.
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