Methanol → 2-Chloro-4,6-dimethoxy-1,3,5-triazine

Participants

Reaction Conditions

Reaction Steps

In a 1-liter (1000-ml) four-necked flask equipped with a stirrer and a thermometer, 105.1 g (1.05 mol) of potassium hydrogencarbonate and 160.2 g (5.0 mol, water content: 530 ppm) of methanol were placed. With stirring at a temperature of not higher than 10° C., 92.2 g (0.5 mol) of cyanuric chloride was added, followed by stirring at 20° C. for 1 hour. Then, the reaction was conducted at 50° C. for 4 hours. The weight of the reaction solution from which a salt formed had been removed was 230 g, and the water content was 79,800 ppm. After *cooling, methanol was distilled off. To the residue, 400 ml of water was added, and the objective product was extracted with 500 ml of ethyl acetate. The organic layer was washed with 400 ml of water and then vacuum concentrated to obtain 72.7 g of 2-chloro-4,6-dimethoxy-1,3,5-triazine as a white solid. The yield was 82.8%. From the gas chromatography analysis, the purity proved to be 94.9% (% by area).

Provenance & Evidence