反应详情

温度

60 °C

A mixture of 5-(4-nitro-phenyl)-oxazole (2.0 g, 10.5 mmol), iron powder (2.4 g, 42.8 mmol) in acetic acid (5 ml) and methanol (30 ml) was stirred at 60° C. for 1 hour. After filtration through a pad of celite under suction, the filtrate was concentrated under reduced pressure. The residue was purified by flash chromatography eluting with ethyl acetate-hexane (3:4 followed by 3:2) to give 4-oxazol-5-yl-phenyl-amine (1.4 g, 83% yield). 1H NMR (acetone-d6) δ 5.0 (br s, 2H, NH), 6.76 (d, 2H, J=8.7 Hz, Ar), 7.12 (s, 1H, Ar), 7.45 (d, 2H, J=8.6 Hz, Ar), 8.04 (s, 1H, Ar).

1. filtrationAfter filtration through a pad of celite under suction
2. concentrationthe filtrate was concentrated under reduced pressure
3. customThe residue was purified by flash chromatography
4. washeluting with ethyl acetate-hexane (3:4 followed by 3:2)