Sulfur trioxide → Difluoromalonyl fluoride

HRID 1680769

Reaktionsgleichung

Reaktionsgleichung von HRID 1680769
C[O:2][C:3](F)([F:10])[C:4]([F:9])([F:8])[C:5]([F:7])=[O:6].S(=O)(=O)=O>>[F:8][C:4]([F:9])([C:5]([F:7])=[O:6])[C:3]([F:10])=[O:2]

Komponenten

3

Edukt 2

HCID 24682Sulfur trioxideHCID 136846932,2,3,3-Tetrafluoro-3-methoxypropanoyl fluoride

Produkt 1

HCID 2774099Difluoromalonyl fluoride

Versuchsvorschrift

3-Methoxytetrafluoropropionyl fluoride (F. S. Fawcett, C. W. Tullock and D. D. Coffman, J. Amer. Chem. Soc., 84, 4275 (1962)) (81 g, 0.45 mol) was slowly added to sulfur trioxide (80 g, 1.0 mol) at 40° C., and the product difluoromalonyl difluoride, bp -9° C., was continuously removed by distillation through a low temperature still, yield 58 g (0.40 mol, 90%). The product structure was confirmed by: λmax 1860 cm-1 (COF), 19F NMR (no solvent), +17.1 ppm (t J=10 Hz) 2F, COF and -114.2 ppm (t J=10 Hz) 2F, CF2.

Aufarbeitung

  1. customthe product difluoromalonyl difluoride, bp -9° C., was continuously removed by distillation through a low temperature still

Quellen und Nachweise

ORD-Eintrag
ord-4aaf57d3b9884f31b0f50d45f0aeebe8
Quelldatensatz
uspto-grants-1981_06
Patentnummer
US04275225

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