反应详情

8 g of 9,10-dihydro-3-methyl-4H-thieno[3,4-b][1,5]benzodiazepin-10-one and 5.6 ml of chloroacetyl chloride are boiled in 160 ml of dioxane (containing 8 g of ground potassium carbonate) under reflux for 8 hours. The thus-obtained suspension is concentrated to dryness; the resulting residue is taken up in toluene; the toluene mixture is washed with sodium bicarbonate solution and then with water, and the toluene solution is dried over sodium sulfate. Concentration of the dried toluene solution yields 4-chloroacetyl-9,10-dihydro-3-methyl-4H-thieno[3,4-b][1,5]benzodiazepin-10-one (m. 156° to 158° C.).

1. temperatureunder reflux for 8 hours
2. concentrationThe thus-obtained suspension is concentrated to dryness
3. washthe toluene mixture is washed with sodium bicarbonate solution
4. dry with materialwith water, and the toluene solution is dried over sodium sulfate