反应详情

Benzylchloroformate (5.91 g, 34.67 mmol) and triethylamine (5.2 ml) were added sequentially to a solution of 2-(ethylamino)ethanol (3.0 g, 33.66 mmol) in DCM (180 ml) at 0° C. The ice bath was removed and the reaction mixture was allowed to stir overnight at ambient temperature. The solution was washed with 10% citric acid (100 ml) and H2O (2×100 ml) and concentrated in vacuo. The organic phase was dried (MgSO4), concentrated under reduced pressure, and the concentrate was purified by column chromatography (ISCO, silica gel column, eluting with 60→100% EtOAc/hexanes for 14 minutes) to give the title compound (7.29 g, yield: 97%).

1. customThe ice bath was removed
2. washThe solution was washed with 10% citric acid (100 ml) and H2O (2×100 ml)
3. concentrationconcentrated in vacuo
4. dry with materialThe organic phase was dried (MgSO4)
5. concentrationconcentrated under reduced pressure
6. customthe concentrate was purified by column chromatography (ISCO, silica gel column, eluting with 60→100% EtOAc/hexanes for 14 minutes)