The reaction of 7-methoxy-4-nitrobenzofurazan 1-oxide with methoxide ion in dimethyl sulphoxide–methanol (or in dimethyl sulphoxide–methanol–chloroform) gives rise to a kinetically controlled C-5 adduct and a thermo-dynamically controlled C-7 adduct. Some unusual features in the n.m.r. spectra are discussed.
E. Buncel, N. Chuaqui-Offermanns and A. R. Norris, J. Chem. Soc., Perkin Trans. 1, 1977, 415 DOI: 10.1039/P19770000415
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