反应详情

To a mixture of 200 mg (2.8 mmole) of azetidin-2-one, 230 mg (2.8 mmole) of anhydrous sodium acetate, 2 ml of acetic acid, and 17 mg (2 mole % based on the amount of azetidin-2-one) of osmium trichloride trihydrate was added dropwise, with stirring, 1.56 g (6.2 mmole) of a 30% peracetic acid solution in ethyl acetate at room temperature over a period of 2 hours or more. The reaction mixture was poured into 50 ml of water and extracted with n-hexane. The extract was separated and purified by silica gel column chromatography (n-hexane/ethyl acetate=1/1 by volume). Thus, 280 mg (2.2 mmole, percent yield: 78%) of 4-acetoxyazetidin-2-one in a colorless oily state was obtained.

1. additionwas added dropwise
2. extractionextracted with n-hexane
3. customThe extract was separated
4. custompurified by silica gel column chromatography (n-hexane/ethyl acetate=1/1 by volume)