反应详情

温度

0 °C

Thionyl chloride (0.57 g) was added dropwise to a solution of ethyl (RS)-2-hydroxy-2-[2-(1,1-dimethylethyl)pyrimidin-5-yl]-3,3-dimethylbutanoate (0.2 g) and imidazole (0.32 g) in dry acetonitrile (7 cm3), whilst the reaction temperature was maintained at 0° C. The mixture was allowed to warm to the ambient temperature and stirred for a period of sixteen hours, after which time it was poured into water, and extracted into dichloromethane. The combined organic extracts were washed with water, dried over anhydrous magnesium sulphate, passed through a short plug of silica, and concentrated by evaporation of the solvent under reduced pressure to give ethyl (RS)-2-chloro-2-[2-(1,1-dimethylethyl)pyrimidin-5-yl]-3,3-dimethylbutanoate as a yellow oil (0.15 g).

1. temperatureto warm to the ambient temperature
2. extractionextracted into dichloromethane
3. washThe combined organic extracts were washed with water
4. dry with materialdried over anhydrous magnesium sulphate
5. concentrationconcentrated by evaporation of the solvent under reduced pressure