Fmoc-2,3-Dimethy-L-Phenylalanine is an Fmoc-protected, amino acid derivative based on the phenylalanine scaffold in which the alpha-carbon bears two methyl substituents at the 2- and 3-positions, creating a sterically hindered, non-natural substitution pattern. The molecule contains a free carboxyl group and an Fmoc carbamate on the amino group, while the side chain retains a benzyl-type phenyl functionality that can engage in hydrophobic and aromatic interactions during peptide assembly, with the stereochemistry indicated as L at the amino acid center. In peptide chemistry and solid-phase peptide synthesis workflows, the Fmoc protecting group supports stepwise coupling and minimizes undesired amine reactivity, while the 2,3-dimethyl substitution provides a handle for structure-activity studies and conformational or steric modulation in synthetic peptides.
CAT No: CP13806
Fmoc-2,3-Dimethy-L-Phenylalanine is an Fmoc-protected, chiral phenylalanine derivative featuring a stereogenic center at the alpha position and additional methyl-substitution at the 2- and 3-positions of the side-chain carbon framework relative to the phenylalanine backbone. The molecule contains a fluorenylmethoxycarbonyl (Fmoc) carbamate on the amino functionality, a free carboxyl group or carboxyl-derivatized form depending on the supplied specification, and a pendant aryl ring that supports hydrophobic and π-interaction-driven recognition. The 2,3-dimethyl substitution pattern increases steric bulk and can influence conformational preferences during peptide coupling and subsequent amide bond formation. The chiral, protected amino acid architecture makes it suitable for controlled incorporation into peptides and for downstream derivatization strategies that preserve stereochemical integrity during synthesis.
1. Peptide Synthesis
Fmoc-2,3-Dimethy-L-Phenylalanine is used in peptide building workflows where Fmoc deprotection enables stepwise N-terminal assembly under standard protected amino acid chemistry. The Fmoc carbamate protects the alpha-amino group, while the carboxyl functionality participates in peptide coupling to form amide bonds with incoming activated amino acids or peptide fragments. The 2,3-dimethyl substitution next to the side-chain framework can modulate steric approach to the coupling site and can affect local backbone conformation and side-chain packing in the resulting peptide. Incorporation of this chiral, sterically enriched phenylalanine analog supports the construction of peptide libraries and sequence-defined analogs for materials and biochemical research, where side-chain geometry is a design variable in peptide science and synthetic methodology.
2. Peptidomimetics And SAR Studies
Fmoc-2,3-Dimethy-L-Phenylalanine is applied in peptidomimetic and structure-activity relationship studies that require noncanonical phenylalanine-like side chains with controlled stereochemistry. The pendant phenyl ring provides aromatic interaction capability, while the 2,3-dimethyl pattern introduces steric and hydrophobic modulation that can alter binding-site complementarity and conformational bias. Fmoc-protected amino acid incorporation allows rapid generation of analog series where single-residue changes are introduced through peptide coupling chemistry, supporting systematic SAR mapping at the residue level. The resulting peptide analogs can serve as scaffold components for downstream functionalization, including conjugation handles or further side-chain transformations, aligning amino acid derivatization with medicinal chemistry-style fragment optimization.
3. Side-Chain Functionalization
Fmoc-2,3-Dimethy-L-Phenylalanine is suitable for side-chain functionalization routes where the protected amino acid form supports orthogonal chemistry planning. The Fmoc group enables selective N-protection removal without exposing the amino functionality during intermediate handling, allowing the carboxyl group and side-chain substituents to be managed through protected group strategies and activation chemistry. The sterically defined 2,3-dimethyl substitution can influence outcomes of subsequent transformations by steering reagent approach and stabilizing specific conformations in intermediate derivatives. Downstream conversion into modified peptide building blocks or functionalized derivatives supports chemical biology probes, protein interaction studies, and synthetic organic chemistry campaigns focused on residue-level control of sterics and hydrophobicity.
4. Chemical Biology Probes
Fmoc-2,3-Dimethy-L-Phenylalanine is used in chemical biology research to generate residue-defined peptide probes for studying molecular recognition and binding interfaces. The combination of an aromatic side chain and chiral alpha-center supports incorporation into peptides that mimic hydrophobic motifs while maintaining stereochemical fidelity during synthesis. The Fmoc-protected amino acid format supports reproducible peptide coupling, enabling placement of the dimethylated phenylalanine analog at specific positions within a probe sequence. Resulting labeled or modifiable peptide constructs can be employed as biochemical research intermediates for interaction assays, affinity reagent development, and mechanistic studies where side-chain sterics and stereochemistry govern binding behavior.
5. Pharmaceutical Manufacturing Intermediates
Fmoc-2,3-Dimethy-L-Phenylalanine is relevant to pharmaceutical manufacturing workflows that rely on protected amino acid intermediates for controlled peptide or peptide-like intermediate synthesis. The Fmoc-protected amine provides a robust protection strategy compatible with industrial peptide coupling cycles, where orthogonal deprotection and activation steps are used to build defined sequences. The chiral, sterically substituted phenylalanine analog can be incorporated into processable peptide intermediates for downstream derivatization, including formation of conjugates or further functional group installation after assembly. The compound's amino acid derivative structure supports scalable fine chemical synthesis planning, where stereochemical integrity and protecting-group compatibility are central to reliable intermediate preparation for applied product development.
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