A convenient method for the synthesis of 2-arylazocarboxylates from 2-arylhydrazinecarboxylates by aerobicoxidation with ironphthalocyanine is described. The reaction is applicable to oxidative activation of 1-acyl-2-phenylhydrazines. Some preliminary experiments suggest Michaelis–Menten kinetics and participation of radical species in the reaction mechanism.
Palladium-catalyzed Heck coupling of arylhydrazines via C–NHNH<sub>2</sub>bond activation
作者:Jin-Biao Liu、Fu-Jiao Chen、Na Liu、Jiang Hu
DOI:10.1039/c5ra05131b
日期:——
A novel palladium-catalyzed Heck coupling reaction of arylhydrazines with olefins is described, which affords various styrenes with high efficiency. This transformation proceeds through a C–NHNH2bond activation under mild conditions.
The palladium(0)-catalyzed reaction of arylazo aryl sulfones with olefins in benzene at 80°C gave aryl-substituted olefins in good yield. Diarylpalladium(II) species was proposed as an intermediate in this reaction.
在 80°C 下,芳基偶氮芳基砜与烯烃在苯中的钯 (0) 催化反应以良好的收率得到芳基取代的烯烃。二芳基钯 (II) 物种被提议作为该反应的中间体。
A novel Fe-catalyzed olefin hydroamination with aryldiazo sulfones for accessing alkylarylazo compounds has been successfully developed. Aryldiazo sulfones are used as radical acceptors, and N–N double bonds will be regenerated when an arene sulfonyl group leaves. The reaction features mild reaction conditions and a broad substrate scope, allowing access to many azo compounds that would be difficult