反应详情

温度

50 °C

1-Oxa-4,9-diaza-spiro[5.5]undecan-3-one was dissolved in MeOH and treated with acetone (6 equivalents) and NaCNBH3 (4 equivalents). To the reaction mixture was added acetic acid (3 equivalents). The reaction was heated at 50° C. for 6 hours and then cooled to room temperature. The reaction was then poured into an aqueous NaHCO3 solution and extracted with EtOAc (3×). The fractions were dried over MgSO4 and concentrated to provide the title compound as a yellow oil that was purified by chromatography (10% MeOH/CH2Cl2). LC/MS (m/z) 213.1 (MH+), Rt=1.38 minutes.

1. temperaturecooled to room temperature
2. extractionextracted with EtOAc (3×)
3. dry with materialThe fractions were dried over MgSO4
4. concentrationconcentrated