反应详情

69 g of potassium carbonate are added to a solution of 33 g of 5-methoxy-3H-[1,3,4]thiadiazol-2-one in 400 ml of dioxane and the reaction mixture is heated to 60°. Then 31 g of 1-chloro-3-ethoxypropan-2-one are added dropwise within a short period of time and the reaction mixture is stirred at 70° for 20 hours and then, at 20°, is filtered over Celite. The filtrate is concentrated by evaporation. 45 g of the title compound are thus obtained in the form of a light yellow oil.

1. temperaturethe reaction mixture is heated to 60°
2. filtrationat 20°, is filtered over Celite
3. concentrationThe filtrate is concentrated by evaporation