反应详情

温度

70 °C

A mixture of 4-(isoxazol-4-yl)-2-(methylthio)pyrimidine (4) (112.0 g, 0.58 mol) and NaOH (23.2 g) in water/MeOH (350 mL/350 mL) was stirred at 70° C. for 6 h. The reaction mixture was allowed to cool to room temperature and adjusted to pH 3.5 with citric acid. The resulting precipitate was filtered, washed with water (500 mL×3) and ethyl ether (500 mL×3). Then the precipitate was dried in vacuum to give 2-(2-(methylthio)pyrimidin-4-yl)-3-oxopropanenitrile (5) (100 g, 89.3%) as a yellow solid.

1. temperatureto cool to room temperature
2. filtrationThe resulting precipitate was filtered
3. washwashed with water (500 mL×3) and ethyl ether (500 mL×3)
4. customThen the precipitate was dried in vacuum