Bromine → 3,3-Bisfluoromethyl-1-bromo-butan-2-one

HRID 1649175Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1649175
[Br:1]Br.[F:3][CH2:4][C:5]([CH2:10][F:11])([CH3:9])[C:6](=[O:8])[CH3:7]>C(Cl)Cl>[F:3][CH2:4][C:5]([CH2:10][F:11])([CH3:9])[C:6](=[O:8])[CH2:7][Br:1]

Komponenten

4

Edukt 2

HCID 24408BromineHCID 130194334-Fluoro-3-(fluoromethyl)-3-methylbutan-2-one

Produkt 1

HCID 130194343,3-Bisfluoromethyl-1-bromo-butan-2-oneAusbeute 86 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

903 g of the bromine were slowly added dropwise to a mixture of 757 g (5.58 mol) of 3,3-bisfluoromethyl-2-butanone and 4.5 liters of methylene chloride at 20° to 30° C., while cooling and stirring. The yellowish solution was subsequently stirred for a further hour at 20° C. After distilling off the solvent, the residue was distilled in vacuo. 1,030 g (86% of theory) of 3,3-bisfluoromethyl-1-bromo-butan-2-one of boiling point 49°-53° C./0.15 mm Hg were obtained. ##STR73##

Aufarbeitung

  1. temperaturewhile cooling
  2. stirringThe yellowish solution was subsequently stirred for a further hour at 20° C
  3. distillationAfter distilling off the solvent
  4. distillationthe residue was distilled in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-fdbc7fc9d5444c90825d8f4d8e2361a8
Quelldatensatz
uspto-grants-1983_11
Patentnummer
US04415586

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