反应详情

温度

65 °C

To a solution of 6-chloro-2H-pyridazin-3-one (500 mg, 3.83 mmol) in 5 mL dimethylformamide was added 2-dimethylaminoethyl chloride hydrochloride (828 mg, 5.75 mmol), potassium carbonate (1.59 g, 11.5 mmol) and sodium iodide (632 mg, 4.21 mmol). The mixture was stirred over night at 65° C. Solvent was evaporated. The crude product was dissolved in water and purified by preparative HPLC using a gradient of acetonitrile/5% acetonitrile—water phase containing 0.1 M ammonium acetate, to give 174 mg of 6-chloro-2-(2-dimethylamino-ethyl)-2H-pyridazin-3-one as light brown crystals after freeze drying (22% yield).

1. customSolvent was evaporated
2. dissolutionThe crude product was dissolved in water
3. custompurified by preparative HPLC
4. additioncontaining 0.1 M ammonium acetate