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温度

0 °C

4,5-(Dimethylmethylenedioxy)-3-methoxymethoxy-6-heptenal oxime (89.5 mg) was dissolved in 4 ml of methylene chloride, and 0.035 ml of triethylamine was added at 0° C. A 10 % sodium hypochlorite aqueous solution (2.6 ml) was added at 0° C., and the mixture was stirred at 0° C. for 57 hours. The reaction mixture was diluted with diethyl ether, and washed with saturated sodium hydrogen carbonate aqueous solution and a saturated sodium chloride aqueous solution in sequence. The organic layer was dried over anhydrous magnesium sulfate, concentrated under reduced pressure, and purified by silica gel column chromatography to provide 0.0 mg of 4,5-(dimethylmethylenedioxy)-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole having the following properties (yield 56%).

1. washwashed with saturated sodium hydrogen carbonate aqueous solution
2. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. custompurified by silica gel column chromatography