- An Abnormal Thermal Condensation of Hydroquinone with Ethyl Salicylate
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Thermal condensation of hydroquinone with ethyl salicylate in refluxing diphenyl ether affords 1-hydroxyxanthone (I), 1,4-disalicyloxyhydroquinone (IIa), 4'-hyroxyphenyl salicylate (III), 1-hydroxy-4-salicyloxyxanthone (IVa), 1,4-dihydroxyxanthone (V) and 2-hydroxyxanthone (VI).The structures of these comnpounds have been confirmed by PMR and mass spectral data.
- Patel, Ghanshyam, N.,Trivedi, Kunjbihari, N.
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p. 458 - 459
(2007/10/02)
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- Studies in Synthesis of Xanthone Derivatives: Part III+ - A New One-step Synthesis of Xanthones
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Ethyl salicylate condenses with different phenols in refluxing diphenyl ether to give various xanthones in good yields.In the case of resorcinol, hydroquinone, catechol and 3,4-xylenol corresponding phenyl salicylate derivatives are also obtained.Condensation with hydroxycoumarins affords pyranoxanthones, which can not be prepared by the Pechmann condensation of hydroxyxanthones.The structures of the intermediates and final products are established by spectral data (IR, PMR and 13C NMR).
- Patolia, Ravji J.,Trivedi, K. N.
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p. 444 - 447
(2007/10/02)
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