Fmoc-2,5-Dimethy-D-Phenylalanine is an Fmoc-protected, D-configured phenylalanine derivative bearing two methyl substituents at the 2- and 5-positions of the aromatic ring, classifying it as a non-natural, sterically modified aromatic amino acid building block for peptide chemistry. The molecule contains an Fmoc carbamate protecting group on the amino functionality and a free carboxylic acid group, while the side chain features a substituted benzyl moiety that provides hydrophobic character and altered aromatic substitution patterns relevant to structure-activity and binding studies. In synthesis, the protected amino acid is used as a controlled-entry monomer for stepwise peptide assembly, including solid-phase peptide synthesis workflows, and the modified aromatic ring can be incorporated to probe conformational effects and aromatic side-chain contributions in peptide and protein engineering experiments.
CAT No: CP14007
Fmoc-2,5-Dimethy-D-Phenylalanine is an Fmoc-protected D-phenylalanine derivative bearing two methyl substituents at the 2- and 5-positions, creating a sterically defined, chiral amino acid building block with a substituted aromatic side chain. The molecule contains the Fmoc carbamate on the α-amino group and a free carboxyl functionality suitable for amide bond formation after standard peptide coupling activation. The D-configuration at the α-carbon and the additional methyl pattern on the aromatic ring influence conformational preferences, hydrophobic surface area, and steric shielding during coupling and subsequent deprotection/derivatization steps. The combination of a stable Fmoc protecting group, an activated carboxyl group for peptide assembly, and an aryl side chain that can participate in π-π and hydrophobic interactions makes it a practical intermediate for stereochemically controlled peptide and peptidomimetic synthesis.
1. Peptide Synthesis
Fmoc-2,5-Dimethy-D-Phenylalanine is used in solid-phase peptide synthesis and related protected amino acid chemistry where Fmoc removal and subsequent coupling are required to build peptide chains with defined stereochemistry. The Fmoc carbamate protects the α-amino group during chain elongation, while the carboxyl group enables formation of amide bonds to neighboring residues under peptide coupling conditions. The D-configuration and the 2,5-dimethyl-substituted phenyl side chain can modulate backbone orientation and side-chain packing, supporting the preparation of stereochemically enriched peptide segments and D-amino acid-containing sequences. Downstream, the resulting peptides can serve as research-grade constructs for studying sequence effects, conformational behavior, and side-chain substitution patterns in peptide science and peptidomimetic design.
2. Peptidomimetics SAR Studies
Fmoc-2,5-Dimethy-D-Phenylalanine is applied in structure-activity relationship studies and molecular design workflows that require systematic variation of hydrophobic/aromatic side-chain features. The substituted phenyl ring with two methyl groups provides a tunable steric and hydrophobic profile that can be incorporated into peptidomimetics to probe how aromatic substitution patterns affect binding-site complementarity. The D-amino acid stereocenter supports the construction of non-natural peptide analogs with altered proteolytic stability and distinct conformational ensembles compared with L analogs. The Fmoc-protected format facilitates rapid assembly of analog libraries where each derivative differs by side-chain substitution while maintaining controlled stereochemical identity.
3. Side-Chain Functionalization
Fmoc-2,5-Dimethy-D-Phenylalanine is suitable for synthetic organic chemistry routes that transform amino acid derivatives into further functional intermediates by leveraging the protected amino functionality and the aromatic substitution pattern. The Fmoc group enables orthogonal handling of the α-amino site, allowing selective conversion of the carboxyl functionality during derivative formation and enabling subsequent deprotection when required for downstream conjugation chemistry. The 2,5-dimethyl-substituted phenyl side chain can be carried through as a hydrophobic anchor during scaffold elaboration, supporting the synthesis of substituted aromatic motifs within larger molecules. Downstream utility includes preparing functionalized peptide fragments, chiral intermediates for medicinal chemistry, and research materials that require defined aryl substitution while maintaining a stereochemically characterized amino acid core.
4. Chemical Biology Probes
Fmoc-2,5-Dimethy-D-Phenylalanine is used in chemical biology research and biomolecular probe construction where D-amino acid incorporation and aromatic side-chain features support molecular recognition studies. The Fmoc-protected D-amino acid format allows controlled incorporation into peptide-based probes, including fragments designed for target engagement, receptor mapping, or pathway interrogation in assay systems. The substituted aromatic ring can contribute to hydrophobic contacts and specific binding interactions, while the D-configuration can influence probe stability and conformational presentation during binding. Downstream, probe-bearing peptides or peptidomimetics generated from this building block can be further functionalized for labeling strategies, immobilization on surfaces, or incorporation into larger molecular assemblies.
5. Pharmaceutical Manufacturing
Fmoc-2,5-Dimethy-D-Phenylalanine is relevant to pharmaceutical manufacturing and fine chemical synthesis contexts that involve the preparation of protected amino acid building blocks for peptide drug substance or peptide intermediate workflows. The Fmoc protecting group supports robust handling during stepwise assembly, and the carboxyl functionality enables reliable conversion into peptide-grade amide linkages in controlled manufacturing sequences. The stereodefined D-amino acid center and the 2,5-dimethyl-substituted aromatic side chain provide a reproducible structural element for specifying peptide composition and for maintaining consistent physicochemical properties across manufacturing batches. Downstream, the compound can serve as a chiral intermediate for producing D-amino acid-containing peptide segments and for enabling scalable synthesis of peptide analogs used in industrial process development and analytical method qualification.
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