反应详情

To a solution of (5-methyl-3-phenyl-isoxazol-4-yl)-methanol (5.0 g, 26.4 mmol) in THF (50 mL) was added sodium hydride (55% dispersion in mineral oil, 1.27 g, 29.1 mmol). The mixture was stirred at room temperature for 30 min. After addition of 3,6-dichloropyridazine (4.33 g, 29.1 mmol) the mixture was stirred at room temperature for another 5 h. Then the mixture was evaporated, extracted (ethyl acetate/water) and the organic phase was dried with sodium sulfate and concentrated. Chromatography (SiO2, heptane:ethyl acetate=100:0 to 70:30) afforded the title compound (6.62 g, 83%) as a white solid. MS: m/e=302.0 [M+H]+.

1. stirringwas stirred at room temperature for another 5 h
2. customThen the mixture was evaporated
3. extractionextracted (ethyl acetate/water)
4. dry with materialthe organic phase was dried with sodium sulfate
5. concentrationconcentrated