反应详情

(2S)-2-[(2-nitrophenoxy)methyl]oxirane (1.17 g, 6 mmol) was dissolved in ethyl acetate (50 ml). Platinum on charcoal (0.50 g) was added, and the mixture was stirred in the atmosphere of hydrogen for 3 h at room temperature and atmospheric pressure. The catalyst was filtered and washed on the filter with ethyl acetate (10 ml). Acetic anhydride (1.23 g, 1.13 , ml, 12 mmol) and ethyldi(i-propyl)amine (1.55 g, 2.05 ml, 12 mmol) were added to the solution. The reaction mixture was stirred at room temperature for 3 h, then washed with 1M NaOH (2×50 ml) and brine (2×50 ml), and dried with Na2SO4. Evaporation of the solvent and flash chromatography on silica gel with n-heptane/ethyl acetate (from 25 to 75%) afforded the title compound (0.74 g, 3.57 mmol, 60%) as colourless crystals.

1. filtrationThe catalyst was filtered
2. washwashed on the
3. filtrationfilter with ethyl acetate (10 ml)
4. washwashed with 1M NaOH (2×50 ml) and brine (2×50 ml)
5. dry with materialdried with Na2SO4
6. customEvaporation of the solvent and flash chromatography on silica gel with n-heptane/ethyl acetate (from 25 to 75%)