反应详情

To a suspension of 0.55 g of LiAlH4 (13.9 mmol) in THF (10 mL) is added dropwise a solution of 2 g (13.9 mmol) of (tetrahydro-pyran-4-yl)-acetic acid in THF (10 mL) under nitrogen atmosphere (CAUTION: highly exothermic reaction!). Upon complete addition, the reaction is stirred at room temperature for 18 h. The reaction is cooled in an ice-bath and quenched with addition of 1M aqueous NH4Cl solution (2 mL). The resulting precipitate is removed by filtration through Celite® and is rinsed with ethyl acetate (3×100 mL). The filtrate is dried over Na2SO4, filtered and concentrated under reduced pressure to afford 1.63 g of 2-(tetrahydro-pyran-4-yl)-ethanol as a colorless oil. Yield: 90%; ES-MS m/z 131 [M+H].

1. customhighly exothermic reaction
2. additionUpon complete addition
3. temperatureThe reaction is cooled in an ice-bath
4. customquenched with addition of 1M aqueous NH4Cl solution (2 mL)
5. customThe resulting precipitate is removed by filtration through Celite®
6. washis rinsed with ethyl acetate (3×100 mL)
7. dry with materialThe filtrate is dried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure