Journal of the Chemical Society. Perkin transactions II p. 812 - 816 (1981)
Update date:2022-08-30
Topics:
Gold, Victor
Mah, Talat
1H and 13C n.m.r. spectra indicate that 2,6-dimethyl-4H-pyran-4-one in solution in HSO3F-SbF5 ( 1:1 ) is doubly protonated at the exocyclic oxygen atom.The sulphur and nitrogen analogues, 2,6-dimethyl-4H-thiopyran-4-one, and 2,6-dimethyl-N-methyl-4-pyridone, respectively, behave similarly. other related compounds show 1H and 13C n.m.r. spectra in support of our interpretation.
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