The Synthesis of Symmetrical Azobenzenes from Anilines by Phase Transfer Catalysis  

作　　者：Xiao Yang WANG Yu Lu WANG Jian Ping Li Fang SUN Zi Yi ZHANG(Department of Chemistry, National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000)(Department of Chemistry. Henan Normal University. Xinxiang 453002) 

出　　处：《Chinese Chemical Letters》1999年第7期533-536,共4页中国化学快报（英文版）

摘　　要：Using galvinoxyl as catalyst, the phase transfer catalyzed method of oxidation of primary amines to symmetrical azobenzenes with a saturated solution of potassium ferricyanide in 2 mom aqueous potassium hydroxide and dichloromethane is described. The reaction has intimate relation with Hammett substituent constants. This report offers an efficient and rapid method to prepare azobenzenes and a possible mechanism is also suggested.Using galvinoxyl as catalyst, the phase transfer catalyzed method of oxidation of primary amines to symmetrical azobenzenes with a saturated solution of potassium ferricyanide in 2 mom aqueous potassium hydroxide and dichloromethane is described. The reaction has intimate relation with Hammett substituent constants. This report offers an efficient and rapid method to prepare azobenzenes and a possible mechanism is also suggested.

关 键 词：AZOBENZENES ANILINES GALVINOXYL phase transfer radical reaction 

分 类 号：O626[理学—有机化学]