Hydroxylamine HCl → 2,2,2-Trifluoro-1-(4-phenoxyphenyl)-ethanone oxime

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Reaction Conditions

Reaction Steps

122 g (0.46 mol) of 2,2,2-trifluoro-1-(4-phenoxyphenyl)-ethanone are dissolved in 370 ml of ethanol and heated at 80° C. To the solution are added 33.3 g (0.48 mol) of hydroxylammonium chloride and 63.7 g (0.78 mol) of sodium acetate dissolved in 190 ml of water. The reaction mixture is refluxed for 5.5 hours, and poured into water. A pale yellow solid is precipitated. The solid is isolated by filtration and rinsed with water, and added in hexane and heated at 60° C. for 20 min. After cooling, the solid is isolated and rinsed with hexane, yielding 109 g of 2,2,2-trifluoro-1-(4-phenoxyphenyl)-ethanone oxime as a white solid. The structure is confirmed by the 1H-NMR spectrum (CDCl3). δ [ppm]: 7.00-7.10 (m, 4H), 7.18 (t, 1H), 7.39 (t, 2H), 7.55 (d, 2H), 9.35 (br s, 1H).

Provenance & Evidence