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Synthesis of New Xanthones, I
Author(s) -
Pinto Madalena M.,
Polónia Joaquim
Publication year - 1974
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19740570838
Subject(s) - chemistry , xanthone , condensation , mass spectrum , nmr spectra database , stereochemistry , spectral line , organic chemistry , ion , physics , astronomy , thermodynamics
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), CH 3 (4) and CH 3 (2). The UV. and IR. spectra for the third compound are reported too.