B. D. Cavell, J. Macmillan
1967
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Journal
Journal of The Chemical Society C: Organic
Abstract
The synthesis of 6-methoxy-3-methylbenzofurano-4,7-quinone is described. Structures are deduced for the dimers, obtained in the preparation of 4,6,7-trimethoxy- and 4-hydroxy-6-methoxy-3-methylbenzofurans, and also for the trimer obtained in the cyclisation of 3,5-dimethoxyphenoxyacetone.2-Acetyl-3-hydroxy-5-methoxy-1,4-benzoquinone, prepared in several ways, is shown by nuclear magnetic resonance spectroscopy to be in equilibrium with its 1,2-quinonoid tautomer in deuteriochloroform.