NMR solvent shift data for methoxylated xanthones.
The NMR spectra of 1-, 2-, 3-, and 4-hydroxyanthones, 1,3-, 1,5-, 1,6-, 1,7-, 1,8-, 2,5-, 3,4-, 3,5-, 3,6-, and 4,5-dihydroxyxanthones, 1,3,6- and 1,3,8-trihydroxyxanthones, and 1,3,6,8-tetrahydroxyxanthone, as well as those of the corresponding methyl ethers and acetates, were recorded. The spectra of the methyl ethers were measured in deuterochloroform, benzene, trifluoroacetic acid, and 3% trifluoroacetic acid in benzene. The solvent shift parameters for the methoxyl resonances are tabulated and discussed.
D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D014966:Xanthenes / Q000032:analysis*
D014966:Xanthenes