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CAS No. : | 74427-22-8 | MDL No. : | MFCD02093342 |
Formula : | C3H3F5O3S | Boiling Point : | - |
Linear Structure Formula : | F2HCCH2OSO2CF3 | InChI Key : | NKULBUOBGILEAR-UHFFFAOYSA-N |
M.W : | 214.11 | Pubchem ID : | 2774089 |
Synonyms : |
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Chemical Name : | 2,2-Difluoroethyltrifluoromethanesulphonate |
Signal Word: | Danger | Class: | 8,3 |
Precautionary Statements: | P501-P240-P210-P233-P234-P243-P241-P242-P264-P280-P370+P378-P390-P303+P361+P353-P301+P330+P331-P363-P304+P340+P310-P305+P351+P338+P310-P403+P235-P406-P405 | UN#: | 2920 |
Hazard Statements: | H314-H226-H290 | Packing Group: | Ⅱ |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | at 120℃; for 6h;Inert atmosphere; Schlenk technique; | General procedure: A. TfOCH2CF2H(0.514 g, 2.4 mmol) and triphenylphosphine (0.525 g, 2 mmol) were placed in aclosed Schlenk flask under a N2 atmosphere. The mixture was stirredat 120 oC for 24 h and cooled to room temperature. The resultingsolid was washed by diethyl ether, recrystallized from CH2Cl2/hexane,and dried in vacuum to give 0.66 g of (E)-ethene-1,2-diylbis(triphenylphosphonium)ditriflate (3a) as a white solid (0.78 mmol, 78%).2 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
13%; 7% | With caesium carbonate; In acetonitrile; at 60℃; for 2h; | Ethyl 3-methyl-1H-pyrazole-4-carboxylate (0.300 g, 1.95 mmol) was dissolved in dry MeCN (15 mL), then 2,2-difluoroethyl trifluoromethanesulfonate (0.3 11 mL, 2.34 mmol) was added, followed by cesium carbonate (0.951 g, 2.92 mmol) and the reaction mixture was stirred at 60 C for 2 h. The reaction mixture was cooled to rt and dilutedwith EtOAc. Then CELITE was added, and the solvent was removed under reduced pressure. The residue was purified by flash chromatography and was further purified by chiral SFC to afford two products.Intermediate 20A (0.056 g, 13% yield) as a colorless oil, which solidified upon standing. MS(ESI) 219.0 (M+H) ?H NMR (400MHz, DMSO-d6) oe ppm 7.89 (s, 1H),6.29 - 5.90 (m, 1H), 4.38 (td, J13.4, 4.4 Hz, 2H), 4.28 (q, J=7.0 Hz, 2H), 2.46 (s, 3H),1.34 (t, J=7.2 Hz, 3H); ?9F-NMR: (376 MHz, CDC13) oe ppm -122.64 (s, 2F). Intermediate 21A (0.032 g, 7% yield) as a colorless oil. MS(ESI) 219.0 (M+H)?H NMR (400MHz, DMSO-d6) oe ppm 7.90 (s, 1H), 6.29 - 5.91 (m, 1H), 4.41 (td, J13.2,4.4 Hz, 2H), 4.30 (q, J7.1 Hz, 2H), 2.58 (s, 3H), 1.35 (t, J=7.2 Hz, 3H); ?9F-NMR: (376MHz, CDC13) oe ppm -122.36 (s, 2F). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; triethylamine; In acetonitrile; at 120℃; | To a solution of <strong>[28466-26-4]1H-pyrazol-4-amine</strong> (300 mg, 95% purity, 3.43 mmol) in acetonitrile(17 mL) were added 2,2-difluoroethyl trifluoromethanesulfonate (690 p1, 5.1 mmol, CASRN 74427-22-8), powdered potassium carbonate (1 .06 g, 7.65 mmol), and triethylamine (720 pL, 5.1 mmol). The mixture was heated to 12000 overnight. For work-up, it was filtered, and the solid was rinsed with ethyl acetate. Concentraction of the filtrate in vacuo followed by flash chromatography led to the title compound (505 mg, 90% yield, 90%purity).LC-MS (Method B): Rt = 0.43 mm MS (ESIpos): mlz = 148 (M--H)1HNMR (400MHz, DMSO-d6) oe [ppm]: 3.23 (tdd, 2H), 4.72 (t, 1H), 6.05 (tt, 1H), 7.12 (s,2H), 12.10 (s, 1H). |