L-4-Fluorophenylglycine is a natural amino acid derivative in which the phenylalanine-like side chain bears a para-fluoro substituent, giving the molecule an aromatic, fluorinated benzyl side chain attached to the alpha carbon. The structure contains a primary amino group and a carboxyl group on the amino acid backbone, and its side chain is characterized by the electron-withdrawing fluorine at the 4-position that can influence aromatic reactivity and physicochemical properties while maintaining the amino acid's stereochemical identity as indicated by the L designation. L-4-Fluorophenylglycine is used in peptide synthesis and structure-activity studies where fluorinated aromatic residues are incorporated to tune binding interactions, probe conformational effects, or provide a spectroscopically and chemically distinct handle for analytical characterization of peptide and protein analogs.
CAT No: CP10202
L-4-Fluorophenylglycine is an L-configured amino acid analog in which the glycine backbone bears a para-fluorinated phenyl substituent, creating a chiral amino acid intermediate with a stereogenic center at the alpha carbon. The molecule contains a free or derivatizable amino functionality and a carboxylic acid group (depending on the supplied form), enabling standard peptide coupling chemistry while the aromatic ring with a fluorine substituent provides distinctive electronic and steric features for molecular recognition. The aryl-fluorine bond can participate in physicochemical tuning and can serve as a handle for subsequent functionalization strategies, including electrophilic aromatic substitution, cross-coupling, or downstream transformations after appropriate protection of the amino and carboxyl groups. L-4-Fluorophenylglycine is therefore suited as a chiral building block for peptide and peptidomimetic construction, as well as a synthetic intermediate for structure-guided derivatization in medicinal chemistry and process-oriented fine chemical synthesis.
1. Peptide Synthesis
L-4-Fluorophenylglycine supports peptide building-block workflows in peptide synthesis and peptidomimetic assembly where incorporation of a fluorinated phenylglycine residue can modulate local conformational preferences and side-chain electronics. The alpha-amino and carboxyl functionalities enable amide bond formation through common peptide coupling strategies once the amino group is protected and the carboxyl group is activated or esterified as required by the coupling sequence. The L-stereochemistry is preserved during coupling when orthogonal protection and carefully controlled activation conditions are used, allowing stereochemically defined analog libraries. The resulting fluorinated peptide fragments can be extended to longer sequences or used as defined intermediates for SAR studies and biochemical probe preparation.
2. Chiral Amino Acid Derivatization
L-4-Fluorophenylglycine is well aligned with chiral synthesis and amino acid derivatization programs that require a stereodefined aromatic glycine analog as a downstream intermediate. The para-fluoro substituent on the phenyl ring provides a chemically informative motif for electronic tuning and can be retained through protecting-group strategies that focus on the amino and carboxyl sites. Functional group transformations can be applied to the aromatic ring or side-chain region after appropriate protection of the amino acid to prevent undesired reactions, enabling access to fluorinated analogs, substituted aryl derivatives, or cross-coupling-ready intermediates. The stereogenic center and carboxyl/amine reactivity profile make it suitable for generating chiral intermediates used in synthetic organic chemistry and medicinal chemistry process development.
3. Peptidomimetics And SAR Studies
L-4-Fluorophenylglycine functions as a residue for peptidomimetic construction in structure-activity relationship studies where fluorinated aromatic side chains are used to tune binding interactions and metabolic stability proxies. The amino acid framework enables controlled placement of the fluorinated phenylglycine motif into peptide-like scaffolds, while the fluorine substituent can influence hydrogen-bonding patterns, dipole effects, and aromatic interactions relevant to molecular recognition. Protection-group selection for the amine and carboxyl groups supports sequential assembly of analogs and allows late-stage diversification of the aromatic ring when compatible with the remaining functional groups. The resulting fluorinated peptidomimetic intermediates can be used to generate defined SAR panels and support iterative scaffold refinement in applied discovery chemistry.
4. Chemical Biology Probes
L-4-Fluorophenylglycine can be incorporated into chemical biology research workflows that require stereochemically defined amino acid residues for labeled or functionalized biomolecule analogs. The amino acid's coupling-ready functionality enables attachment to peptide tags, linkers, or affinity handles after suitable protection and activation, while the fluorinated aromatic motif can serve as a stable, spectroscopically informative element for tracking or quantification strategies. The para-fluoro group may also support downstream derivatization routes that introduce additional functionality while maintaining the stereochemical identity of the residue. The resulting fluorinated constructs can be used as biochemical research intermediates for studying ligand-protein interactions, enzyme recognition, or pathway-dependent binding using defined molecular structures.
5. Pharmaceutical Intermediate Preparation
L-4-Fluorophenylglycine is suitable for pharmaceutical intermediate preparation and fine chemical synthesis routes where a chiral fluorinated amino acid is required as a defined precursor for drug-like scaffolds. The presence of an L-configured alpha carbon with amino and carboxyl functionality enables incorporation into protected amino acid derivatives that can be processed through peptide coupling, amide formation, or conversion to activated intermediates for scaffold assembly. The aromatic fluorine substituent can be carried through synthesis to provide a persistent structural element that supports medicinal chemistry optimization and downstream synthetic diversification. Industrially relevant manufacturing planning can leverage orthogonal protection strategies to manage chemoselectivity between the amino, carboxyl, and aryl fluoride under controlled process conditions, producing consistent intermediates for subsequent synthetic steps.
6. Process Chemistry For Fluorinated Building Blocks
L-4-Fluorophenylglycine aligns with process chemistry needs for manufacturing fluorinated chiral building blocks and amino acid-derived intermediates used in specialty chemical production. The molecule's functional-group pattern supports conversion into protected amino acid forms, including N-protected derivatives and carboxyl-activated intermediates, which can be handled in stepwise synthesis while maintaining stereochemical integrity. The para-fluoro phenyl group provides a robust motif that can survive protection/deprotection sequences and can be leveraged for controlled downstream aryl functionalization when required for route design. The resulting intermediates are applicable to scalable synthesis of fluorinated peptide fragments, peptidomimetic scaffolds, and other fluorinated organic compounds that depend on reproducible chiral amino acid chemistry.
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