反应详情

温度

70 °C

6.1 mg (0:02 mmol) of sodium 2-iodobenzenesulfonate prepared by Preparation Example 4, 0.49 g (0.8 mmol) of powdered Oxone (registered trademark), 0.5 g (3.5 mmol) of anhydrous sodium sulfate and 200 mg (1 mmol) of 3,3-dimethyl-1,5-dioxaspiro[5.5]undecan-9-ol were added to 5 ml of ethyl acetate, and the mixture was heated at 70° C. while being stirred under a nitrogen for eight hours. The later treatment was carried out in the same way as in Example 1, and then 3,3-dimethyl-1,5-dioxaspiro[5.5]undecan-9-one was obtained. The yield of the obtained 3,3-dimethyl-1,5-dioxaspiro[5.5]undecan-9-one was determined and the result is shown in Table 2. (Yield 91%)