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用Galvinoxyl自由基为催化剂,芳胺类化合物在饱和铁氰化钾的氢氧化钾溶液和二氯甲烷的两相转移催化下合成了18个对称取代偶氮苯,提供了一个快速、方便、高效的制备偶氮苯类化合物的新方法,讨论了Hammett取代基常数与反应速度的关系,同时也讨论了取代基效应对产率的影响,并对反应机理也做了合理的解释.
With Galvinoxyl free radical as catalyst, aromatic amines synthesized 18 symmetrically substituted azobenzenes under the saturated potassium ferricyanide potassium hydroxide solution and dichloromethane two-phase transfer catalysis, providing a fast, convenient and efficient The new method for the preparation of azobenzenes is discussed. The relationship between the Hammett substituent constant and the reaction rate is also discussed. At the same time, the effect of substituent effect on the yield is also discussed. The reaction mechanism is also explained reasonably.