反应详情

温度

120 °C

To a suspension of 5-methyl-4-phenyl-1,3-oxazol-2(3H)-one (430 mg, 2.45 mmol) in phosphorus oxychloride (2.36 g, 14.7 mmol) was added pyridine (194 mg, 2.45 mmol) and the mixture was stirred at 120° C. for 2 hr. The reaction mixture was diluted with acetonitrile and added dropwise to water (about 30° C.). The organic materials were extracted with ethyl acetate, washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=7:3) to give the title compound (233 mg, yield 49%) as a yellow oil.

1. extractionThe organic materials were extracted with ethyl acetate
2. washwashed with saturated brine
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=7:3)