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用相应的β- 羟乙基砜衍生物在碱催化下与Ｎ－甲基中磺酸钠反应，得到产率较高 的β－（Ｎ－甲基－磺基乙胺基）乙基砜染料或中间体。用动力学方法及其化学方法研究 了４－〔β－（Ｎ－甲基－磺基乙胺基）乙基砜基〕苯胺的合成反应机理。动力学数据表明： 在碱缓冲溶液中，反应速度与羟乙基砜的浓度一次方，Ｎ－甲基牛磺酸钠浓度的零次方 成正比。由此可见，虽然在反应中，中间产物乙烯砜不能检出，但反应是经历了消 去－加成历程进行的。
The corresponding β-hydroxyethyl sulfone derivative is reacted with sodium N-methylsulfonate in the presence of base catalysis to obtain a high yield of β- (N-methyl-sulfoethylamino) ethyl sulfone dye Or intermediate. The synthesis mechanism of 4- [β- (N-methyl-sulfoethylamino) ethylsulfone] aniline was studied by kinetic method and its chemical method. Kinetic data show that in alkali buffer solution, the reaction rate is proportional to the zero-order concentration of hydroxyethylsulfone in the first order and the concentration of sodium N-methyl taurinate. Thus, although in the reaction, the intermediate vinylsulfone can not be detected, but the reaction is going through the elimination - addition process.