4-(1-Azi-2,2,2-trifluoroethyl)benzoic acid contains a substituted benzoic acid core bearing a 1-azi-2,2,2-trifluoroethyl substituent, classifying it as an aromatic carboxylic acid derivative with an azide functional group and a fluorinated ethyl moiety. The molecule features a carboxyl group for acid-base chemistry and coupling chemistry, while the azide provides a chemically stable handle that can undergo bioorthogonal-style transformations in labeling and conjugation workflows, and the 2,2,2-trifluoroethyl group contributes strong electron-withdrawing character and increased fluorine-mediated hydrophobicity. In synthesis and chemical biology research, it is employed as a functionalized aromatic building block for preparing azide-containing conjugates, probes, and further substituted benzoic acid derivatives used in structure-activity studies, analytical method development, and materials or surface functionalization.
CAT No: CP27525
CAS No:85559-46-2
Synonyms/Alias:p-(3-(Trifluoromethyl)-3H-diazirin-3-yl)benzoic acid;4-(3-Trifluoromethyldiazirino)benzoic acid;TDBA
4-(1-Azi-2,2,2-trifluoroethyl)benzoic acid is a substituted benzoic acid bearing a 2,2,2-trifluoroethyl group and an azide (-N3) functionality, combining a carboxylic acid handle with a click-ready azide for downstream conjugation chemistry. Its strong electron-withdrawing trifluoromethyl environment and the azide enable robust labeling strategies in chemical biology and materials functionalization workflows, while the benzoic acid moiety supports coupling to activated derivatives used in linker and surface immobilization schemes. This reagent is typically handled as a small-molecule building block for preparing azide-containing intermediates, probes, and labeled constructs where orthogonal reactivity and fluorine-enabled physicochemical tuning are advantageous.
1. Click Chemistry Labeling
4-(1-Azi-2,2,2-trifluoroethyl)benzoic acid is used as an azide-containing building block for copper-catalyzed azide-alkyne cycloaddition (CuAAC) labeling workflows in chemical biology and analytical chemistry. Researchers incorporate it into linkers and small-molecule tags to generate triazole-linked conjugates with alkyne-bearing partners such as imaging handles, affinity ligands, or reporter groups. The presence of the benzoic acid group supports preparation of activated ester or amide-forming derivatives for controlled attachment to biomolecule scaffolds, while the 2,2,2-trifluoroethyl substituent helps modulate hydrophobicity and mass spectrometric detectability in LC-MS workflows.
2. Bioconjugate Linker Synthesis
4-(1-Azi-2,2,2-trifluoroethyl)benzoic acid serves as a practical intermediate for constructing azide-functional linkers used in bioconjugation development. Protein and polymer conjugation teams commonly convert the carboxylic acid into coupling-ready forms to enable attachment to amine-containing biomolecules or to polymer backbones, then use the azide for subsequent site-specific or modular assembly via click chemistry. The trifluoroethyl group provides a chemically stable substituent that can improve traceability during method development, supporting workflows where the conjugate identity and integrity are monitored by mass spectrometry and related analytical techniques.
3. Fluorine-Tagged Analytical Standards
4-(1-Azi-2,2,2-trifluoroethyl)benzoic acid is applied as a fluorine-containing small-molecule standard or tracer component for quantitative LC-MS method development and calibration strategies. Analytical developers use the trifluoroethyl motif to generate a distinctive mass signature, while the azide functionality allows the standard to be incorporated into click-derived analogs that mirror the chemical features of target conjugates. In practice, it supports preparation of reference materials for verifying labeling efficiency, assessing conjugate formation in synthetic screening, and enabling consistent quantitation across batches where azide-to-triazole conversion is part of the workflow.
4. Surface and Polymer Functionalization
4-(1-Azi-2,2,2-trifluoroethyl)benzoic acid is used to introduce azide functionality onto polymer materials and solid supports through carboxyl-group coupling strategies, followed by click-based grafting of alkyne-bearing moieties. Materials scientists and surface chemistry teams leverage the azide for post-functionalization, enabling stepwise construction of coatings, affinity surfaces, or patterned chemical interfaces without requiring direct incorporation of more complex reactive groups during initial material formation. The benzoic acid handle supports attachment chemistry to common substrates via activated carboxyl derivatives, while the trifluoroethyl substituent can aid in differentiating modified surfaces using fluorine-sensitive analytical readouts.
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