Synthesis of New Xanthones,I |
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Authors: | Madalena M. Pinto,Joaquim Pol nia |
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Affiliation: | Madalena M. Pinto,Joaquim Polónia |
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Abstract: | Condensation of salicylic acid and C-methylphloroglucinol gave the already known 1,3-dihydroxy-2-methylxanthone ( 1 ) along with two new compounds: 1,3-dihydroxy-4-methylxanthone ( 2 ) and a second one tentatively presented as being 1,3-dihydroxy-2-methyl-4-(2-hydroxybenzoyl)xanthone ( 3 ). The UV., IR., NMR, and mass spectra for the two first compounds are reported and their structures discussed on the basis of δ-values for H(2), H(4), CH3(4) and CH3(2). The UV. and IR. spectra for the third compound are reported too. |
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