反应详情

温度

80 °C

To a stirred solution of 4-[1-(4-chloro-3-nitrophenacyl)-1H-benzimidazol-2-yl]-furazan-3-ylamine (0.07 g, 0.175 mmol) in ethanol (6 ml) and water (1 ml) is added two drops of concentrated hydrochloric acid and iron powder (0.1 g, 17.5 mmol). The reaction mixture is heated at 80° C. for 8 hours. Filtration and evaporation at reduced pressure gives the crude product. Purification by extraction with ethyl acetate and chromatography on silicagel yields the title compound as colorless solid, m.p. 228-230° C.

1. filtrationFiltration and evaporation at reduced pressure
2. customgives the crude product
3. customPurification
4. extractionby extraction with ethyl acetate and chromatography on silicagel