Diethyl Ether → 1-Bromo-3,3-dimethyl-4-fluoro-2-butanone

Reaktionsgleichung

[Br:1]Br.[CH3:3][C:4]([CH3:10])([CH2:8][F:9])[C:5](=[O:7])[CH3:6].CCOCC>O>[Br:1][CH2:6][C:5](=[O:7])[C:4]([CH3:10])([CH3:3])[CH2:8][F:9]

Komponenten

Versuchsvorschrift

480 g of bromine were slowly added dropwise to a mixture of 354 g (3 mol) of 3,3-dimethyl-4-fluoro-butan-2-one and 2,000 ml of ether at 20° to 30° C., while cooling and stirring. The yellowish solution was subsequently stirred, at 20° C., for a further 1 hour and 500 ml of water were then added carefully. The ether phase was separated off, washed several times with water and dried over sodium sulphate. After distilling off the solvent, the residue was distilled under a waterpump vacuum. 472 g (80% theory) of 1-bromo-3,3-dimethyl-4-fluoro-butan-2-one of boiling point 80°-90° C./11 mm Hg were obtained. ##STR24##