反应详情

温度

0 °C

To a solution of 3-(2-fluoro-phenyl)-5-methyl-isoxazole-4-carboxylic acid ethyl ester (73.6 g, 295 mmol) in THF (977 mL) was added portionwise lithiumaluminiumhydride (6.48 g, 162 mmol) over 20 min, at 0° C., and the reaction mixture was stirred at room temperature for 2.5 h. The mixture was then cooled to 0° C. and water (7.5 mL) added followed by sodium hydroxide (15% solution, 7.5 mL) and then again with water (21 mL). The precipitate was then filtered off and washed with THF. The combined washings and filtrate were then evaporated. Purification by chromatography (SiO2, heptane:ethyl acetate=75:25) afforded the title compound (34.7 g, 57%) which was obtained as a light yellow oil. MS: m/e=208.0 [M+H]+.

1. temperatureThe mixture was then cooled to 0° C.
2. filtrationThe precipitate was then filtered off
3. washwashed with THF
4. customThe combined washings and filtrate were then evaporated
5. customPurification by chromatography (SiO2, heptane:ethyl acetate=75:25)