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Finely powdered potassium nitrate (3.1 g, 30.7 mmol) was added to a stirred solution of 7,8-dihydroxy-1H-1,2,3-triazolo[4,5-f]quinoxaline (6.1 g, 30 mmol) in 50 ml of conc. sulfuric acid at 0° C. (ice bath). The mixture was stirred over night at room temperature. Then a further amount of potassium nitrate (3 g) was added with cooling on an ice bath, and stirring was continued for 5 h at room temperature. The mixture was poured into 700 ml of ice/water, and the yellow precipitate was isolated, wa
| 产品 | 7,8-Dihydroxy-4-nitro-1H-1,2,3-triazolo[4,5-f]quinoxaline |
| 反应物 |
potassium nitrate 7,8-dihydroxy-1H-1,2,3-triazolo[4,5-f]quinoxaline potassium nitrate ice |
| 试剂 |
H2SO4 |
| 程序 |
1、Add Finely powdered potassium nitrate (3.1 g, 30.7 mmol) was added to a stirred solution of 7,8-dihydroxy-1H-1,2,3-triazolo[4,5-f]quinoxaline (6.1 g, 30 mmol) in 50 ml of conc. sulfuric acid at 0° C. (ice bath) 2、Stir The mixture was stirred over night at room temperature 3、Add Then a further amount of potassium nitrate (3 g) was added 4、Cool with cooling on an ice bath 5、Stir stirring 6、Wait was continued for 5 h at room temperature 7、Add The mixture was poured into 700 ml of ice/water 8、Yield the yellow precipitate was isolated 9、Wash washed with water 10、Precipitate recrystallized from ethanol giving 5.2 g (70%) of the title compound |
角色：
分类：产品
角色：reactant
分类：原料
实体类型：exact
角色：reactant
分类：原料
实体类型：exact
角色：reactant
分类：原料
实体类型：exact
角色：reactant
分类：原料
实体类型：exact
角色：solvent
分类：催化剂
实体类型：exact