SCHEDULED MAINTENANCE
Under the reaction conditions for the Wallach rearrangement, 4-methyl-ONN-(1α), 4-methyl-NNO-(1β), 4-nitro-ONN-(2α), and 4-nitro-NNO-azoxybenzene (2β) were found to undergo αβ-interconversion, while 4-bromo-ONN-(3α) and 4-bromo-NNO-azoxybenzene (3β) do not. The αβ-interconversion occurs with both mono- and di-protonated forms of the azoxybenzenes.
J. Yamamoto, H. Aimi, Y. Masuda, T. Sumida, M. Umezu and T. Matuura, J. Chem. Soc., Perkin Trans. 2, 1982, 1565 DOI: 10.1039/P29820001565
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