Journal of the Chemical Society (Resumed)

859. Xanthones: cyclisation of 3′-substituted 2-carboxydiphenyl ethers

AA Goldberg, AH Wragg

文献索引：Goldberg; Wragg Journal of the Chemical Society, 1958 , p. 4227,4230

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被引用次数: 21

摘要

Cyclisation of 2: 3'-dicarboxydiphenyl ether (VII) with polyphosphoric acid gave a mixture of xanthonecarboxylic acids separable, by virtue of the large difference in solubilities of their pyridine salts, into xanthone-l-and-3-carboxylic acid in the ratio of 85: 15. The orientation of