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…
文献索引：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
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.
