反应详情

温度

-78 °C

6-Trifluoromethyl-3H-isobenzofuran-1-one (1.77 g) is dissolved in methylene chloride (20 ml) and the mixture is cooled to −78° C., and thereto is added a 1.0M diisobutylaluminum hydride in toluene (19.5 ml) and the mixture is stirred for 1 hour and 20 minutes. The reaction solution is cooled to room temperature, and thereto are added a saturated aqueous ammonium chloride solution and ethyl acetate, and the mixture is separated, and the organic layer is washed with a saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=4:1→3:2) to give 6-trifluoromethyl-1,3-dihydro-isobenzofuran-1-ol (1.36 g). MS (m/z): 187 [M+H—H2O]+

1. temperatureThe reaction solution is cooled to room temperature
2. customthe mixture is separated
3. washthe organic layer is washed with a saturated brine
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=4:1→3:2)