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在介质pH为2～6,温度范围0～10℃条件下进行的三氟-氯嘧啶第一活泼氟原子与2-萘胺-4,6,8-三磺酸缩合的反应为2.25级反应,对三氟一氯嘧啶和2-萘胺-4,6,8-三磺酸均分别为一级,对氢氧根为0.25级。反应活化能E=15.98千卡/克分子。在较低的温度(例如5℃)和pH=5～6,尽量提高三氟一氯嘧啶和2-萘胺-4,6,8-三磺酸初始浓度条件下进行缩合反应最为有利。
The reaction of trifluoro-chloropyrimidine first active fluorine atom with 2-naphthylamine-4,6,8-trisulfonic acid under the conditions of medium pH 2 ~ 6 and temperature 0 ~ 10 ℃ is 2.25 , For trifluoro-chloropyrimidine and 2-naphthylamine-4,6,8-trisulfonic acid were the first grade, respectively, for the hydroxide of 0.25. Reaction activation energy E = 15.98 kcal / mole. At lower temperatures (eg 5 ° C) and pH = 5-6, it is most advantageous to maximize the condensation reaction of trifluoromethachloropyrimidine and 2-naphthylamine-4,6,8-trisulfonic acid at the initial concentration.