反应详情

温度

80 °C

To a solution of N-(3-nitro-5-pyrrol-1-yl-phenyl)acetamide (7.51 g, 30.61 mmol) in ethanol (100 ml), were added iron powder (4.273 g, 76.53 mmol, 2.5 eq.) and a solution of calcium chloride (8.49 g, 76.53 mmol, 2.5 eq.) in water (100 ml). The mixture was stirred at 80° C. for 2 h and then filtered through a pad of celite. The celite pad was washed with ethyl acetate (200 ml) and the combined organic layer was washed with water (100 ml) and brine (25 ml). The solvent was evaporated and the residue was purified by column chromatography (20% ethyl acetate in hexanes) to give the compound in 87% yield (5.7 g). 1H NMR (300 MHz, DMSO-d6): δ 9.9 (s, 1H), 8.25 (s, 1H), 7.8 (d, 1H), 7.6 (s, 1H), 7.05 (d, 1H), 6.8 (s, 1H), 6.5 (m, 1H), 6.3 (m, 1H), 5.15 (s, 2H), 2.02 (s, 3H).

1. filtrationfiltered through a pad of celite
2. washThe celite pad was washed with ethyl acetate (200 ml)
3. washthe combined organic layer was washed with water (100 ml) and brine (25 ml)
4. customThe solvent was evaporated
5. customthe residue was purified by column chromatography (20% ethyl acetate in hexanes)
6. customto give the compound in 87% yield (5.7 g)