Preparation of muconic acid anhydrides. Characterization of the 1-oxacyclohepta-3, 5-diene-2, 7-dione structure
TR Demmin, MM Rogic
Index: Demmin, Timothy R.; Rogic, Milorad M. Journal of Organic Chemistry, 1980 , vol. 45, # 6 p. 1153 - 1156
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Citation Number: 36
Abstract
4 4a a substantial contribution from resonance structure 4a to the overall electronic description of the molecule. With the increased double bond character at the methoxy oxygen, homoallylic type coupling may be effectively transmitted. Long-range coupling,-0.4 Hz, is also present in the analogous o-benzoquinone 3 where similar resonance may exist. However, in the related 3-methoxy-5-tert-b~-tylcatechol (7), with no resonance possible as ...
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