反应详情

温度

-5 °C

A solution of borane dimethyl sulphide complex in tetrahydrofuran (11.7 mL, 23.32 mmol, 3.0 eq) is added dropwise within 10 minutes at −5° C. to a stirred solution of (4-tert-butoxycarbonylamino-cyclohexyl)-acetic acid (2.0 g, 7.77 mmol, 1.0 eq) in tetrahydrofuran (50 mL). The reaction mixture is stirred at −5° C. for 20 minutes then at room temperature for 3 hours. Methanol (10 mL) is cautiously added to the reaction mixture that is then evaporated and repeatedly treated with methanol and concentrated to dryness to afford [trans-4-(2-hydroxy-ethyl)-cyclohexyl]-carbamic acid tert-butyl ester as a white solid (1.89 g, 99.5% yield).

1. waitat room temperature for 3 hours
2. customis then evaporated
3. additionrepeatedly treated with methanol
4. concentrationconcentrated to dryness