Hydroxyamine hydrochloride → 4-Phenoxyphenoxyacetone oxime

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Reaction Steps

Over about 1 hour, a solution of 22 g of hydroxylamine hydrochloride and 26 g of anhydrous sodium acetate in 110 ml of water is added dropwise at room temperature to a solution of 64 g of 4-phenoxyphenoxyacetone in 260 ml of ethanol. After the slightly exothermic reaction has subsided, the mixture is stirred for a further 3.5 hours at reflux temperature. Subsequently, the ethanol is distilled off from the reaction mixture by rotary evaporation, the aqueous residue is extracted three times with a 2:1 mixture of ether and hexane, the combined organic phases are washed with water and with 10% sodium bicarbonate solution and then dried over sodium sulfate. The solvent is then distilled off. Recrystallisation from a mixture of diethyl ether and pentane affords 4-phenoxyphenoxyacetone oxime with a melting point of 59°-61° C.

Provenance & Evidence