The Synthesis of New Type Bisazo Compounds Using 4??Hydroxy??2, 2, 6, 6??Tetramethyl??l??Piperidinyloxyl as The Phase??Transfer Dehydrogenation Catalyst

XY Wang, YL Wang, ZY Zhang, JP Li…

Index: Wang, Xiao-Yang; Wang, Yu-Lu; Zhang, Zi-Yi; Li, Jian-Ping; Wang, Cai-Lan Journal of the Chinese Chemical Society, 1998 , vol. 45, # 6 p. 835 - 837

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Citation Number: 5

Abstract

Abstract Using 4-hydroxy-2, 2, 6, 6-tetramethyl-l-piperidinyloxyl as the phase-transfer dehydrogenation catalyst to prepare bisazo compounds is reported for the first time. Nine bisaryl carbodiazones were synthesized in high yields under mild conditions. This method was efficient, convenient and rapid. A possible mechanism was suggested by a nitroxide free radical which acted on aryl substituted carbazides to form azo compounds.