Hydrochloric Acid → 1-(2,4-Difluorophenyl)-2-methylpropan-1-one

Participants

Reaction Steps

To a mixture of 120 g (0.68 mmol) of 2,4-difluorobenzoyl chloride, 3.7 g (37 mmol) of copper (I) chloride, and 400 ml of diethyl ether was added dropwise 442 ml of diethyl ether containing 130.2 g (0.88 mol) of isopropylmagnesium bromide at -25° C. over 4 hours. The temperature was elevated up to -5° C., and the mixture was stirred at that temperature for 30 minutes. To the reaction mixture were added dropwise 150 ml of water and then 120 ml of 6N hydrochloric acid. The organic layer was separated, washed successively with 5% hydrochloric acid, a saturated sodium chloride aqueous solution, a saturated sodium carbonate aqueous solution, and a saturated sodium chloride aqueous solution, and dried. The solvent was removed by distillation under reduced pressure, and the residue was distilled under reduced pressure to obtain 104.3 g (83%) of 1-(2,4-difluorophenyl)-2-methylpropan-1-one as a colorless oily substance.

Provenance & Evidence