By reacting cyanuric acid with an equimolar amount of a lower member of alcohol in the presence of 2, 6-dimethylpyridine at low temperature in acetone, a series of 2, 4-dichloro-6-alkoxy-s-triazines was produced.The latter dissolved in acetone was then treated separately with aqueous sodium p-chlorophenolate and pentachlorophenolate, first in the cold and finally at 40-450, to give 2-chloro-4-alkoxy-6-aryloxy-s-triazines(Ⅱ) in fairly good yields.