The structures and the reactivities of the title vinylogous sulphonamides are compared with those of the corresponding vinylogous amides derived from cyclohexane-1,3-dione. Their behaviour on alkylation, acylation, and addition-substitution has been studied. Isolation of some of the products can be explained in terms of the existence of a tautomeric equilibrium in the parent systems.
S. Fatutta, G. Pitacco, C. Russo and E. Valentin, J. Chem. Soc., Perkin Trans. 1, 1982, 2045 DOI: 10.1039/P19820002045
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