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Showing papers by "Tom J. Mabry published in 1965"



Journal ArticleDOI
TL;DR: In this paper, the NMR spectra including signal assignments are presented for the trimethylsilyl ethers of five flavonoid glycosides; quercitrin, rutin, hesperidin, naringin and tectoridin.

42 citations


Journal ArticleDOI
TL;DR: In this article, it was shown that the glucose residue in betanin is attached at the 5-hydroxyl group (structure 2): Treatment of Betanin with diazomethane, acidic hydrolysis and acetylation afforded 5 O-acetyl-6-O-methyl-neobetanidin trimethylester, which was cleaved by alkali.
Abstract: It is shown that the glucose residue in betanin is attached at the 5-hydroxyl group (structure 2): Treatment of betanin with diazomethane, acidic hydrolysis and acetylation afforded 5-O-acetyl-6-O-methyl-neobetanidin trimethylester (9), which was cleaved by alkali. The cleavage product was esterified with methanol and oxydized by means of FREMY salt to 5-hydroxy-6-methoxy-2-methoxycarbonyl-indole (15).

39 citations



Journal ArticleDOI
TL;DR: In this article, the NMR characterization of several Baptisia flavonoids, including the 7-glycosides of luteolin, apigenin and orobol are discussed.

19 citations


Journal ArticleDOI
TL;DR: In this article, a neuer Isolierungsgang von allgemeiner Anwendbarkeit fur phenolische Naturstoffe fuhrte zur Auffindung des Genistein-7-rutinosids in Baptisia sphaerocarpa.
Abstract: Ein neuer Isolierungsgang von allgemeiner Anwendbarkeit fur phenolische Naturstoffe fuhrte zur Auffindung des Genistein-7-rutinosids in Baptisia sphaerocarpa. Die Struktur dieses bisher noch nicht beschriebenen Glykosids wurde aus dem Kernresonanzspektrum erkannt. Sie lies sich durch Uberfuhrung des Aglykons in bekannte Methoxy-isoflavone sowie durch gaschromatographische Analyse des silylierten Zuckeranteils bestatigen.

18 citations