Fmoc-2-Methy-L-Phenylalanine

Fmoc-2-Methy-L-Phenylalanine is an Fmoc-protected, chiral amino acid derivative bearing a phenylalanine-derived side chain with an additional 2-methyl substitution at the alpha-carbon stereocenter. The molecule contains the fluorenylmethoxycarbonyl (Fmoc) group on the amino functionality, a free carboxylate or carboxyl-derived functionality depending on the supplied form, and a hydrophobic benzyl/phenyl side-chain environment that can influence peptide conformation and steric profile. The presence of the extra methyl-bearing stereocenter makes stereochemical control central for downstream peptide coupling and for generating defined diastereomeric outcomes in analog libraries. As a protected amino acid building block, it participates in standard peptide synthesis workflows after orthogonal deprotection strategies that remove Fmoc while preserving other functional motifs during fragment assembly and purification.

1. Peptide Synthesis

Fmoc-2-Methy-L-Phenylalanine is used in solid-phase peptide synthesis and solution-phase peptide assembly where Fmoc protection supports controlled N-terminal coupling cycles. The Fmoc group enables iterative peptide bond formation by providing an orthogonally removable amine protecting strategy, while the chiral 2-methyl stereocenter and the phenylalanine-type side chain contribute defined steric and hydrophobic characteristics to the growing chain. The protected amino acid format supports amide bond formation through activation of the carboxyl functionality, yielding peptide sequences with an extra alpha-methyl constraint that can modulate backbone flexibility. Peptide building block incorporation enables preparation of stereochemically defined analogs for peptide chemistry studies and for manufacturing of peptide intermediates used in custom synthesis workflows.

2. Peptidomimetics

Fmoc-2-Methy-L-Phenylalanine is applied in peptidomimetic construction where alpha-methylation and aromatic side-chain presentation support the design of constrained peptide-like scaffolds. The added methyl group at the amino acid backbone can reduce conformational entropy and can bias local secondary structure tendencies, while the phenyl side chain provides hydrophobic surface for molecular recognition. Fmoc deprotection and subsequent coupling allow systematic placement of this chiral residue into peptide analogs to generate structure-activity relationship panels without changing the overall synthetic logic of peptide assembly. Downstream, the resulting peptidomimetics can serve as chemically defined research materials for studying binding-site preferences, protease resistance trends, and scaffold optimization strategies in applied amino acid chemistry.

3. SAR Studies

Fmoc-2-Methy-L-Phenylalanine is utilized in structure-activity relationship studies where stereodefined incorporation of a 2-methyl phenylalanine analog helps map how backbone substitution affects molecular properties. The compound's chiral center and aromatic side chain can be leveraged to generate analog series that probe the influence of steric bulk, hydrophobicity, and conformational constraint on target interactions. Fmoc-compatible peptide coupling enables parallel synthesis of residue-substituted variants, supporting medicinal chemistry workflows that require defined stereochemistry at each position. The resulting SAR-ready peptide or peptidomimetic intermediates can be carried into downstream derivatization steps such as terminal modifications, side-chain functional elaboration, and analytical method development.

4. Chemical Biology

Fmoc-2-Methy-L-Phenylalanine is suited for chemical biology research where incorporation into peptide probes allows controlled presentation of a hydrophobic, stereochemically defined residue within a labeling scaffold. The Fmoc-protected amine supports reliable peptide assembly, enabling placement of the alpha-methyl stereocenter at defined positions that can affect probe stability, binding kinetics, and proteolytic susceptibility in assay formats. The phenylalanine-derived side chain provides a handle for hydrophobic interactions that can be exploited when designing peptide-based ligands, affinity reagents, or substrate analogs for mechanistic studies. The protected amino acid intermediate nature supports iterative synthesis of probe libraries and supports downstream conjugation strategies after orthogonal deprotection and functional group installation.

5. Pharmaceutical Manufacturing

Fmoc-2-Methy-L-Phenylalanine is relevant to pharmaceutical manufacturing and fine chemical production of peptide intermediates where Fmoc-protected amino acids serve as standardized inputs for reproducible peptide synthesis. The Fmoc group provides a robust, process-compatible protection strategy for N-terminal chemistry, while the chiral alpha-methyl substitution and aromatic side chain can be used to engineer defined sequence features in drug-like peptides and peptide-derived intermediates. Carboxyl functionality in the protected amino acid format supports activation and coupling steps that translate into scalable peptide construction under controlled conditions. The resulting manufactured peptide intermediates can feed into subsequent purification, formulation screening, or further synthetic transformations such as terminal group modifications and conjugation to non-peptidic moieties.

6. Analytical Research

Fmoc-2-Methy-L-Phenylalanine is used in analytical research as a stereochemically defined reference material and as a synthetic precursor for preparing peptide standards containing an alpha-methyl phenylalanine motif. The Fmoc protection and chiral backbone architecture facilitate the generation of defined peptide fragments that can be used to validate chromatographic separation, mass spectrometric fragmentation patterns, and amino acid residue assignment in complex mixtures. The aromatic side chain and additional methyl stereocenter can lead to characteristic retention and fragmentation behaviors that support method development for peptide characterization. The compound's role as a protected amino acid building block enables preparation of labeled or unlabeled analytical standards and supports downstream analytical method transfer across peptide chemistry workflows.

1. TMEM16F and dynamins control expansive plasma membrane reservoirs

2. Characterization of Novel P-Selectin Targeted Complement Inhibitors in Murine Models of Hindlimb Injury and Transplantation

3. Olfactory receptor based piezoelectric biosensors for detection of alcohols related to food safety applications

4. Therapeutic potential of an intestinotrophic hormone, glucagon-like peptide 2, for treatment of type 2 short bowel syndrome rats with intestinal bacterial and fungal dysbiosis

5. Immune responses to peptides containing homocitrulline or citrulline in the DR4-transgenic mouse model of rheumatoid arthritis