反应详情

A mixture of 4-amino-2-nitrophenol (25 mmol, 3.85 g) in EtOH (6 mL) on an ice bath was treated with nitric acid (69% aq soln.; 1.8 mL). To this of cyanamide (50% aq. soln.; 4 mL) was added. The reaction mixture was refluxed under N2 for 22 h. The solvent was evaporated. The dark brown solid residue was washed with EtOH and was dried under high vacuum to afford the title compound as a grey solid (3.53 g, 54%).

1. temperatureThe reaction mixture was refluxed under N2 for 22 h
2. customThe solvent was evaporated
3. washThe dark brown solid residue was washed with EtOH
4. customwas dried under high vacuum