反应详情

温度

50 °C

40% Formaline (25 ml) is added to a solution of 20 grams of 1,2-diphenyl-4-[2-(phenylsulfinyl)-ethyl]-pyrazolidine-3,5-dione in 120 ml of methanol. The solution, under magnetic stirring, is heated up to 50° C. for one hour and kept, always under a magnetic stirring, at room temperature for 12 hours. At the end the solvent is evaporated under reduced pressure, the residue is washed with water and extracted with dichloromethane.

1. customAt the end the solvent is evaporated under reduced pressure
2. washthe residue is washed with water
3. extractionextracted with dichloromethane