A thermally degenerate [1,9] sigmatropic shift
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society D: Chemical Communications
- No. 15,p. 833
- https://doi.org/10.1039/c29710000833
Abstract
When 7-acetyl-3-methylanthranil (3) is heated to 160–180° the n.m.r. signals of the two methyl groups coalesce as a result of valence tautomerism for which a novel type of [1,9] sigmatropic mechanism is suggested.Keywords
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