反应详情

温度

80 °C

To aminoguanidine hydrochloride (1.76 g, 15.9 mmol), water (5 ml), sodium hydroxide (636 mg, 15.9 mmol), and 3-ethyl-2,4-pentanedione (manufactured by Tokyo Chemical Industry, purity: 90.0% or higher) (4.50 g, 35.0 mmol) were added, and then stirred at 80° C. for 8 hours. To the reaction mixture, water (30 ml) was added, and then stirred at 0° C. for 1 hour. The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure to obtain 5-ethyl-2-(4-ethyl-3,5-dimethylpyrazol-1-yl)-4,6-dimethylpyrimidine (1.35 g, 33%).

1. stirringstirred at 0° C. for 1 hour
2. filtrationThe precipitated crystals were collected by filtration
3. washwashed with water
4. customdried under reduced pressure