Dimethylhydantoin → 3-(6-Chloro-n-hexyl)-5,5-dimethyl-hydantoin

Reaktionsgleichung

[CH3:1][C:2]1([CH3:9])[NH:6][C:5](=[O:7])[NH:4][C:3]1=[O:8].C(=O)([O-])[O-].[K+].[K+].[Cl:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22]Cl>O>[Cl:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][N:4]1[C:3](=[O:8])[C:2]([CH3:9])([CH3:1])[NH:6][C:5]1=[O:7]

Komponenten

Versuchsvorschrift

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.