反应详情

温度

82.5 °C

10.6 g of finely pulverised 85% potassium hydroxide are introduced into a solution of 9.3 g of N,N′-diacetylhydrazine and 141 g of dimethyl sulfoxide in such a manner that a temperature of 33° C. is not exceeded. After heating to 80 to 85° C., 23 g of 2,2′-dichlorodiethyl ether are added dropwise to the reaction mixture over the course of 50 minutes. The resulting highly fluid suspension is maintained at 80 to 85° C. for 3 hours, then cooled to 20 to 25° C. and filtered, and the filtration residue is washed with dimethyl sulfoxide. 11.4 g (76.0%) of 4,5-diacetyl-[1,4,5]-oxadiazepine are obtained from the combined filtrates by concentration by evaporation.

1. temperatureThe resulting highly fluid suspension is maintained at 80 to 85° C. for 3 hours
2. temperaturecooled to 20 to 25° C.
3. filtrationfiltered
4. washthe filtration residue is washed with dimethyl sulfoxide