反应详情

132 g of ethylene oxide are introduced into a melt of 530 g of 4-stearyl-1,2,4-triazolidine-3,5-dione (starting material 3) over a period of 6 hours at 120° C. in such a way that no ethylene oxide escapes. The reaction mixture is cooled and subsequently dissolved in 2.5 liters of acetone. A deposit precipitates on cooling and is isolated by filtration under suction and washed with acetone, giving 575 g of 1,2-bis-(2-hydroxyethyl)-4-stearyl-1,2,4-triazolidine-3,5-dione in the form of colourless crystals melting at 68° to 79° C.

1. temperatureThe reaction mixture is cooled
2. customA deposit precipitates
3. temperatureon cooling
4. customis isolated by filtration under suction
5. washwashed with acetone