Summary
Methods of nuclear oxidation are applied for the preparation of chromone derivatives, many of which have been required for the study of isomeric change. Just as in the flavone group the presence of a methoxyl (hydroxyl) in the 3-position prevents isomeric change from the 5:7:8 to the 5:6:7 arrangement of hydroxyl groups; in its absence the isomeric change takes place.
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References
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Charkavorty, D.K., Mukerjee, S.K., Murty, V.V.S. et al. Nuclear oxidation in flavones and related compounds. Proc. Indian Acad. Sci. (Math. Sci.) 35, 34 (1952). https://doi.org/10.1007/BF03172482
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DOI: https://doi.org/10.1007/BF03172482