Treatment of aromatic nitro compounds with sodium borohydride in alkaline ethanol in the presence of a catalytic amount of diphenyl ditelluride at 25 °C affords the corresponding azoxy compounds selectively in high yields, in situ generated sodium benzenetellurolate being the active species which produces the intermediate aromatic nitroso compounds.
K. Ohe, H. Takahashi, S. Uemura and N. Sugita, J. Chem. Soc., Chem. Commun., 1988, 591 DOI: 10.1039/C39880000591
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