反应详情

4,5-(Dimethylmethylenedioxy)-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole (257 mg) was dissolved in 10 ml of tetrahydrofuran, and 1 ml of 1N hydrochloric acid was added, followed by stirring the mixture at room temperature for 4 hours. The reaction mixture was diluted with diethyl ether, and neutralized with a sodium hydrogen carbonate aqueous solution. The organic layer was washed with a sodium chloride aqueous solution, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography to afford 167 mg of 4,5-dihydroxy-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole having the following property (yield 77%).

1. washThe organic layer was washed with a sodium chloride aqueous solution
2. dry with materialdried over anhydrous sodium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe obtained residue was purified by silica gel column chromatography