反应详情

Of the compound from Example 11A, 3.6 g (13.17 mmol) were introduced in 26 ml of nitromethane and admixed with 0.69 ml (3.95 mmol) of N,N-diisopropylethylamine. The mixture was stirred at RT for 2 h. The reaction mixture was diluted with ethyl acetate and washed in succession twice each with 1N hydrochloric acid and saturated aqueous sodium hydrogen carbonate solution, and then with saturated aqueous sodium chloride solution, dried over sodium sulphate and concentrated on a rotary evaporator. The residue (about 5 g) was dissolved in 15 ml of isopropanol at reflux. After cooling, the precipitated product was isolated by filtration, washed with a little isopropanol and sucked dry. After further drying in an HV, the title compound was obtained: 2.26 g (51% of theory).

1. washwashed in succession twice each with 1N hydrochloric acid and saturated aqueous sodium hydrogen carbonate solution
2. dry with materialwith saturated aqueous sodium chloride solution, dried over sodium sulphate
3. concentrationconcentrated on a rotary evaporator
4. dissolutionThe residue (about 5 g) was dissolved in 15 ml of isopropanol
5. temperatureat reflux
6. temperatureAfter cooling
7. customthe precipitated product was isolated by filtration
8. washwashed with a little isopropanol
9. customsucked dry
10. customAfter further drying in an HV