反应详情

温度

70 °C

To ammonium chloride (3.96 g, 74.0 mmol) in water was added iron powder (325 mesh; 4.13 g, 74.0 mmol). To the resulting mixture was added 2,2,7-trifluoro-6-nitro-4-(prop-2-ynyl)-2Hbenzo[b][1,4]oxazin-3(4H)-one (7.06 g, 24.67 mmol) in methanol/tetrahydrofuran. The resulting mixture was stirred vigorously at 70° C. for 2 hours. The reaction was quenched in water/ethyl acetate under stirring. The resulting 2 phase system was filtered and the layers were separated. The water layer was subsequently extracted with ethyl acetate. The combined organic phases were washed with brine, dried with Na2SO4 and concentrated to yield 5.15 g of the title compound.

1. customThe reaction was quenched in water/ethyl acetate
2. stirringunder stirring
3. filtrationThe resulting 2 phase system was filtered
4. customthe layers were separated
5. extractionThe water layer was subsequently extracted with ethyl acetate
6. washThe combined organic phases were washed with brine
7. dry with materialdried with Na2SO4
8. concentrationconcentrated