反应详情

To a solution of 1-methoxy-piperidin-4-one [prepared according to Journal of Organic Chemistry (1961), 26, 1867-74] (15.0 g, 116.1 mmol) in ethanol (430 ml) was added sodium borohydride 96% (2.29 g, 58.1 mmol) in portions. The reaction mixture was stirred at room temperature for 5 hours, evaporated to half of its volume, poured on cold saturated aqueous ammonium chloride and thoroughly extracted with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate and concentrated. The residue was purified by chromatography on silica gel (ethyl acetate). Yield: 10.9 g of 1-methoxy-piperidin-4-ol as a liquid.

1. customevaporated to half of its volume
2. additionpoured on cold saturated aqueous ammonium chloride
3. extractionthoroughly extracted with ethyl acetate
4. washThe combined organic layers were washed with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated
7. customThe residue was purified by chromatography on silica gel (ethyl acetate)