Substituted dichlorotriazines are prepared by the reaction of a suitable hydroxy compound with cyanuric chloride in a substantially non-polar organic solvent, in the presence of an aqueous alkali metal hydroxide solution having a concentration in the range of about 1-20% by weight and a phase transfer catalyst. The phase transfer catalyst employed is a tetraalkylammonium or tetraalkylphosphonium salt free from aromatic substituents and wherein the alkyl groups contain 3-15 carbon atoms. Hydrophilic phase transfer catalysts, in which the alkyl groups contain up to about 5 carbon atoms, are preferred.
取代的二
氯三嗪是在浓度约为 1-20%(按重量计)的碱
金属氢氧化物
水溶液和相转移催化剂的存在下,在基本无极性的有机溶剂中,通过合适的羟基化合物与
三聚氯氰反应制备的。采用的相转移催化剂是不含芳香族取代基的四烷基
铵盐或四烷基
鏻盐,其中烷基含有 3-15 个碳原子。亲
水性相转移催化剂是首选,其中烷基最多含有约 5 个碳原子。