反应详情

Dissolve 2-ethyl benzaldehyde (7 mL, 53.2 mmol), nitromethane (8.5 mL, 158 mmol), and ammonium acetate (1.6 g, 20.8 mmol) in acetic acid (40 mL) and heat to reflux under a nitrogen atmosphere for 17 hours. Cool to room temperature and concentrate. Dissolve in isopropyl alcohol (150 mL) and chloroform (750 mL) and add silica gel (108 g). To the resulting slurry, slowly add sodium borohydride (7.8 g, 206 mmol). Stir the mixture for 17 hours, filter, concentrate and purify (silica gel chromatography, eluting with 0:100 to 10:90 ethyl acetate:hexanes), to give the desired compound as an orange oil.

1. temperatureheat
2. temperatureto reflux under a nitrogen atmosphere for 17 hours
3. concentrationconcentrate
4. dissolutionDissolve in isopropyl alcohol (150 mL)
5. additionchloroform (750 mL) and add silica gel (108 g)
6. filtrationfilter
7. concentrationconcentrate
8. custompurify
9. wash(silica gel chromatography, eluting with 0:100 to 10:90 ethyl acetate:hexanes)