Sulfur trioxide → Difluoromalonyl fluoride

HRID 1680408

Reaktionsgleichung

Reaktionsgleichung von HRID 1680408
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-e7060104b948402dbaf13a5afc904951
Quelldatensatz
uspto-grants-1981_06
Patentnummer
US04273728

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