Complete ¹H and 13C NMR assignments and anti fungal activity of two 8-hydroxy flavonoids in mixture
Johann, Susana; Smânia-Júnior, Artur; Pizzolatti, Moacir G; Schripsema, Jan; Braz-Filho, Raimundo; Branco, Alexsandro.
An. acad. bras. ciênc;
79(2): 215-222, June 2007. tab, ilus
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| LILACS | ID: lil-454592
A mixture of the two new flavonols 8-hydroxy-3, 4', 5, 6, 7-pentamethoxyflavone (1) and 8-hydroxy-3, 3', 4', 5, 6, 7-hexamethoxyflavone (2) was isolated from a commercial sample of Citrus aurantifolia. An array of one- (¹HNMR, {¹H}-13C NMR, and APT-13C NMR) and two-dimensional NMR techniques (COSY, NOESY, HMQC and HMBC) was used to achieve the structural elucidation and the complete ¹H and 13C chemical shift assignments of these natural compounds. In addition, the antifungal activity of these compounds against phytopathogenic and human pathogenic fungi was investigated.
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