反应详情

128 g of 5,5-dimethyl-hydantoin (1.0 mol), 69 g of anhydrous potassium carbonate (0.5 mol) and 775 g of 1,6-dichlorohexane are reacted at 132°-150°C internal temperature (external temperature 160°C) and the resulting water of reaction is removed continuously by azeotropic circulatory distillation. After 6 hours 25 minutes, the reaction is complete and the reaction mixture is filtered hot to remove the potassium chloride formed. The filtrate is concentrated on a rotary evaporator and dried to constant weight at 100°C and 10-1 mm Hg.

1. customis removed continuously by azeotropic circulatory distillation
2. filtrationthe reaction mixture is filtered hot
3. customto remove the potassium chloride
4. customformed
5. concentrationThe filtrate is concentrated on a rotary evaporator
6. customdried to constant weight at 100°C