反应详情

7,7-Dimethyl-1,4-dioxaspiro[4.5]decan-8-one (2.8 g, 15.217 mmol, 1 eq) and 4-methoxy-benzylamine (2.08 g, 15.217 mmol, 1 eq) were dissolved in dichloromethane (100 ml) and stirred for 3 h at RT. Na(OAc)3BH (9.67 g, 45.65 mmol, 3 eq) was added in portions at 0° C., and stirring was carried out for 20 h at RT. The reaction solution was diluted with dichloromethane (100 ml), washed with water (100 ml) and sat. NaCl solution (100 ml), dried over sodium sulfate and concentrated under reduced pressure. The crude product was purified by column chromatography (Alox neutral, 10% ethyl acetate in hexane). Yield: 46% (2.13 g, 6.98 mmol).

1. stirringstirring
2. waitwas carried out for 20 h at RT
3. washwashed with water (100 ml) and sat. NaCl solution (100 ml)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe crude product was purified by column chromatography (Alox neutral, 10% ethyl acetate in hexane)