Desilylation of N-trimethylsilylmethyl- and deprotonation of N-methyl-l,2,5-oxadiazolium (furazan) salts gave ring expansions to 6H-l,2,5-oxadiazines; the results of 6-31G calculations on the expected furazan-N-methanide intermediate are reported.
R. N. Butler, K. M. Daly, J. M. McMahon and L. A. Burke, J. Chem. Soc., Perkin Trans. 1, 1995, 1083 DOI: 10.1039/P19950001083
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