Oxidation of aromatic amines to symmetrical substituted  azobenzenes under phase-transfer catalysis with  Galvinoxyl/K~3Fe(CN)~6/KOH system

Acta Chimica Sinica ›› 1999, Vol. 57 ›› Issue (11): 1277-1282. Previous Articles

Original Articles

Galvinoxyl/K~3Fe(CN)~6/KOH复合体系相转移催化合成对称取代偶氮苯

王玉炉;王彩兰;李建平;王红;张自义;王晓阳

河南师范大学化学系.新湘(453002);兰州大学化学系.兰州(730000)

发布日期:1999-11-15

Oxidation of aromatic amines to symmetrical substituted azobenzenes under phase-transfer catalysis with Galvinoxyl/K~3Fe(CN)~6/KOH system

Wang Yulu;Wang Cailan;Li Jianping;Wang Hong;Zhang Ziyi;Wang Xiaoyang

Henan Normal Univ, Dept Chem.Xinxiang(453002);Lanzhou Univ, Dept Chem.Lanzhou(730000)

Published:1999-11-15

Abstract

Using Galvinoxyl and potassium ferricyanide as catalyst, the oxidation of aromatic amines to symmetrical azobenzenes in a mixture of aqueous potassium hydroxide and dichloromethane is described for the first time in this paper. Close corelation between the rates and Hammett substituent constants is observed. The yields of products were also affected by substituents. The present work offers an efficient and rapid method for preparing azobenzenes. A possible mechanism is suggested as well.

Key words: FREE RADICAL REACTION, POTASSIUM FERRICYANIDE, POTASSIUM HYDROXIDE, PHASE TRANSFER CATALYSIS, BENZENE AZO COMPOUNDS, SUBSTITUENT EFFECT, REACTION MECHANISM

CLC Number:

O643

Cite this article

Wang Yulu;Wang Cailan;Li Jianping;Wang Hong;Zhang Ziyi;Wang Xiaoyang. Oxidation of aromatic amines to symmetrical substituted azobenzenes under phase-transfer catalysis with Galvinoxyl/K~3Fe(CN)~6/KOH system[J]. Acta Chimica Sinica, 1999, 57(11): 1277-1282.

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Galvinoxyl/K~3Fe(CN)~6/KOH复合体系相转移催化合成对称取代偶氮苯

Oxidation of aromatic amines to symmetrical substituted azobenzenes under phase-transfer catalysis with Galvinoxyl/K~3Fe(CN)~6/KOH system

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Galvinoxyl/K~3Fe(CN)~6/KOH复合体系相转移催化合成对称取代 偶氮苯

Oxidation of aromatic amines to symmetrical substituted azobenzenes under phase-transfer catalysis with Galvinoxyl/K~3Fe(CN)~6/KOH system

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

Galvinoxyl/K~3Fe(CN)~6/KOH复合体系相转移催化合成对称取代偶氮苯