2,4,6- Trifluoro -DL-Phenylalanine is a fluorinated phenylalanine derivative in which three hydrogen atoms on the aromatic ring are replaced by fluorine at the 2, 4, and 6 positions, retaining the amino acid backbone with an aniline-like side chain. The molecule bears both a free amino group and a carboxyl group and is provided in a DL stereochemical form, which corresponds to a racemic mixture at the α-carbon, while the electron-withdrawing fluorines modify the aromatic ring's polarity and hydrogen-bonding characteristics. In research and synthesis, this non-proteinogenic amino acid analogue is used for peptide and labeling studies where fluorination can tune physicochemical properties, support analytical differentiation, or provide a defined aromatic handle for structure-activity and structure-property investigations.
2,4,6- Trifluoro -DL-Phenylalanine is a fluorinated phenylalanine analog available as a DL mixture, featuring three fluorine atoms on the aromatic ring that strongly influence electronics, lipophilicity, and metabolic stability trends relative to non-fluorinated phenylalanine. This non-natural amino acid building block is used in medicinal chemistry and peptide/peptidomimetic development where aromatic fluorination is leveraged to tune physicochemical properties and structure-property relationships. Its amino acid functionality enables incorporation into synthetic sequences and downstream derivatization workflows commonly used for SAR studies and analytical reference material preparation.
1. Peptidomimetic SAR Building
2,4,6- Trifluoro -DL-Phenylalanine is used by medicinal chemistry and chemical biology teams to construct peptidomimetic scaffolds and aromatic-rich analogs for structure-activity relationship (SAR) studies. The 2,4,6-trifluorinated phenyl ring provides a direct handle for probing how aryl fluorination affects conformational preferences, hydrogen-bonding patterns, and overall molecular properties in peptide-like systems. Researchers typically employ it as a defined amino acid building block in custom synthesis campaigns where consistent incorporation of the fluorinated aromatic motif is required across analog series.
2. Fluorinated Peptide Analog Synthesis
2,4,6- Trifluoro -DL-Phenylalanine serves as a non-natural amino acid input for preparing fluorinated peptide analogs used in protein chemistry and assay development. The fluorinated side chain supports the development of peptide standards and modified peptide reagents where aromatic substitution is used to modulate chemical behavior and improve robustness in analytical or chemical probing workflows. Because the material is provided as a DL mixture, it is commonly selected for exploratory analog libraries and comparative studies rather than stereochemically constrained designs, enabling rapid evaluation of the fluorinated motif's impact within peptide-like constructs.
3. Metabolic Stability and Tracer Studies
2,4,6- Trifluoro -DL-Phenylalanine is frequently incorporated into metabolic research toolkits to evaluate how aromatic fluorination alters the fate of phenylalanine-like structures under enzyme-rich conditions. In practice, researchers use fluorinated amino acid analogs as defined substrates or reference components in stability and degradation experiments, supporting comparative interpretation against non-fluorinated controls. The presence of multiple fluorine atoms on the aryl ring makes this building block particularly useful for LC-MS-based tracking of fluorinated species, where the strong mass signature of the trifluorinated motif aids analytical discrimination.
4. Analytical Reference and Method Development
2,4,6- Trifluoro -DL-Phenylalanine is used in analytical chemistry workflows as a chemically defined fluorinated amino acid reference for method development, calibration, and identification support. Laboratories developing LC-MS or targeted MS assays for fluorinated metabolites, peptide fragments, or derivatized amino acid standards often rely on this compound to verify retention behavior and mass-based detection of the 2,4,6-trifluorinated aromatic motif. Its amino acid identity and non-natural substitution pattern make it a practical anchor standard when building assay panels for fluorinated chemical libraries and metabolite profiling experiments.
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