反应详情

A solution of 2-fluoro-5-trifluoromethoxy-benzaldehyde (9.78 g, 47 mmol) in ethanol (50 mL) was treated with hydroxylamine HCl (3.59 g, 52 mmol) and sodium acetate (4.27 g, 52 mmol). The resulting mixture was heated under reflux for 2 h. The solvent was then evaporated and the residue stirred with water (50 mL). The precipitate was filtered off, dried and chromatographed (SiO2, heptanes:ethyl acetate=100:0 to 80:2) to afford the title compound (9.21 g, 88%) as a white solid. MS: m/e=223.0 [M]+.

1. temperatureThe resulting mixture was heated
2. temperatureunder reflux for 2 h
3. customThe solvent was then evaporated
4. filtrationThe precipitate was filtered off
5. customdried
6. customchromatographed (SiO2, heptanes:ethyl acetate=100:0 to 80:2)