N-Fmoc-O-(4-fluorophenyl)-L-serine incorporates an aromatic ether containing a fluorine substituent that alters electronic behavior and steric orientation. Researchers employ it to explore hydrogen bonding, hydrophobic interactions, and conformational restriction. Its Fmoc protection supports controlled synthetic integration. The residue enriches aromatic diversity in peptide design.
CAT No: R2154
CAS No:2350054-53-2
Synonyms/Alias:N-Fmoc-O-(4-fluorophenyl)-L-serine;2350054-53-2;
N-Fmoc-O-(4-fluorophenyl)-L-serine is a synthetic amino acid derivative featuring an Fmoc (9-fluorenylmethyloxycarbonyl) protecting group at the N-terminus and a 4-fluorophenyl moiety esterified to the serine side chain. As a non-standard, functionally modified amino acid, it is widely utilized in peptide chemistry, particularly in solid-phase peptide synthesis (SPPS) and the development of bioactive peptide analogs. The presence of the fluorinated aromatic group introduces unique physicochemical properties that are valuable for structure-activity relationship studies and the design of peptides with enhanced stability or altered biological profiles.
Peptide Synthesis: In the context of SPPS, N-Fmoc-O-(4-fluorophenyl)-L-serine serves as a building block for the incorporation of fluorinated side chains into peptide sequences. The Fmoc protection enables precise stepwise elongation of peptide chains while safeguarding the α-amino group, ensuring high fidelity during assembly. The 4-fluorophenyl modification on the serine side chain allows researchers to introduce site-specific aromatic fluorine atoms, which can modulate peptide conformation, improve resistance to enzymatic degradation, or alter binding interactions with target proteins.
Structure-Activity Relationship Studies: The incorporation of fluorinated amino acids such as this derivative is instrumental in probing the effects of side-chain modifications on peptide function. By substituting natural serine residues with O-(4-fluorophenyl) analogs, scientists can systematically investigate how electronic and steric changes influence receptor binding, enzymatic recognition, or overall peptide stability. This approach supports the rational design of novel peptide-based probes, inhibitors, or mimetics in biochemical research.
Biophysical and Spectroscopic Analysis: The unique electronic properties of the 4-fluorophenyl group make this compound valuable for applications in NMR and other spectroscopic studies. The presence of a fluorine atom can serve as a sensitive probe for monitoring conformational dynamics, intermolecular interactions, or environmental changes within peptides and proteins. Such applications are particularly relevant in mapping binding sites, elucidating folding pathways, or tracking molecular interactions in complex biological systems.
Peptide Functionalization: N-Fmoc-O-(4-fluorophenyl)-L-serine is also employed in the synthesis of functionalized peptides for immobilization, labeling, or conjugation purposes. The aromatic fluorine moiety can act as a handle for subsequent chemical modifications, such as click chemistry or bioconjugation strategies, enabling the generation of tailored peptide constructs for surface attachment, biosensor development, or affinity purification schemes.
Chemical Biology Tool Development: The strategic incorporation of this modified amino acid into peptides facilitates the creation of specialized chemical biology tools. Such tools may include fluorine-labeled probes for imaging, affinity tags for target identification, or modified scaffolds for studying post-translational modifications. The versatility and reactivity of the O-(4-fluorophenyl) group expand the utility of synthetic peptides in diverse experimental setups, supporting advanced investigations in molecular recognition, signal transduction, and protein engineering.
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