Sulfur trioxide → Difluoromalonyl fluoride

HRID 1702853

Reaktionsgleichung

Reaktionsgleichung von HRID 1702853
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-7065c9f392b84b1999c24db01f1d4cc6
Quelldatensatz
uspto-grants-1982_09
Patentnummer
US04349650

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