Journal of Organic Chemistry p. 5329 - 5334 (1993)
Update date:2022-08-12
Topics:
Mugnier, Yves
Gard, Jean-Christophe
Huang, Youqin
Couture, Yvon
Lasia, Andrzej
Lessard, Jean
The electrochemical reduction of nitrosobenzene in tetrahydrofuran with tetrabutylammonium hexafluorophosphate as the supporting electrolyte and in the presence of fluorene or indene at room temperature gives a mixture of an anil (1 or 3), a nitrone (2 or 4), and azoxybenzene and requires only a catalytic amount of electricity.Lowering the temperature and/or increasing the proportion of proton donor favors the formation of the anil at the expense of the nitrone and azoxybenzene: a 97percent yield of anil 1 was obtained from an electrolysis carried out at -30 deg C using 5 equiv of fluorene.The possible steps of the chain reactions involved are discussed on the basis of electrochemical and chemical data and digital simulation.With phenylacetylene as the proton donor, there is no reaction between nitrosobenzene and phenylacetylene and azoxybenzene is the main product formed.
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