Potassium Hydroxide → 2-Bromo-4-chloro-1-(difluoromethoxy)benzene

関与物質

反応手順

36 ml of aqueous potassium hydroxide solution (6M) were added to a solution of 3.5 g (16.9 mmol) of 2-bromo-4-chlorophenol in 36 ml of acetonitrile, the mixture was cooled in an ice bath and 6.5 ml (26.9 mmol, 1.6 eq.) of difluoromethyl trifluormethanesulphonate [Angew. Chem. Int. Ed. 2013, 52, 1-5; Journal of Fluorine Chemistry 2009, 130, 667-670] were added dropwise with vigorous stirring. The reaction mixture was stirred for 5 min and diluted with 200 ml of water. The aqueous phase was extracted twice with in each case 150 ml of diethyl ether. The combined organic phases were dried (sodium sulphate), filtered, concentrated under reduced pressure and dried. The aqueous phase was once more extracted with diethyl ether. The organic phase was dried (sodium sulphate), filtered, concentrated under reduced pressure and dried. Yield of the two combined residues: 3.4 g (80% of theory)

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