Hydrogen Peroxide → 2-(2-Hydroxyethyl)cyclopropylmethyl t-butyldimethylsilyl ether

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2-vinylcyclopropylmethyl t-butyldimethylsilyl ether (17.1 g, 81 mmol) was dissolved in tetrahydrofuran (100 ml) and cooled to 0° C. A borane-dimethylsulfide complex (2.5 g, 33 mmol) was added thereto, and the mixture was stirred for one hour. Ethanol (38 ml), 3N sodium hydroxide (38 ml) and 30% hydrogen peroxide (18.2 ml) were added thereto, and the mixture was stirred for 30 minutes. The saturated sodium chloride aqueous solution was added thereto, and the product was extracted with ethyl acetate, then dried over anhydrous magnesium sulfate and concentrated. Then, it was purified by silica gel column chromatography to obtain 2-(2-hydroxyethyl)cyclopropylmethyl t-butyldimethylsilyl ether (15.0 g, yield: 81%).

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