98755-26-1Relevant academic research and scientific papers
5,6,4'-TRIHYDROXY-7,8-DIMETHOXYFLAVONE FROM THYMUS MEMBRANACEUS
Ferreres, Federico,Barberan, Francisco A. T.,Thomas, Francisco
, p. 1869 - 1871 (1985)
From the extracts of Thymus membranaceus subsp. membranaceus, the new naturally occuring 5,6,4'-trihydroxy-7,8-dimethoxyflavone (thymusin) has been isolated and identified.Its structure was elucidated by comparison with its isomeric flavone obtained on ac
TLC, UV AND ACIDIC TREATMENT IN THE DIFFERENTIATION OF 5,6- AND 5,8-DIHYDROXYFLAVONES, 3-METHOXYFLAVONES AND FLAVONOLS
Barberan, F.A.T.,Ferreres, F.,Tomas, F.
, p. 5733 - 5740 (2007/10/02)
UV and TLC techniques constitute easy procedures to distinguish between 5,6-dihydroxy-7,8-dimethoxy- and 5,8-dihydroxy-6,7-dimethoxyflavonoids, that are difficult to characterize by NMR and classical UV techniques.The acidic treatment of the original products to obtain Wessely-Moser isomers, useful for comparison purposes, yielded novel demethylated products.UV and MS data of 5,8,4' -trihydroxy-6,7,3'-trimethoxyflavone, 5,6,8,3',4'-pentahydroxy-7-methoxyflavone and 5,6,8,4'-tetrahydroxy-7,3'-dimethoxyflavone are presented for the first time.
