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Bafoudiosbulbins F and G, further clerodane diterpenoids from <i>Dioscorea bulbifera</i> L. var <i>sativa</i> and revised structure of Bafoudiosbulbin B
Auteur(s)
Teponno, Rémy Bertrand
Tapondjou, Azefack Léon
Abou-Mansour, Eliane
Tane, Pierre
Barboni, Luciano
Date de parution
2008
In
Phytochemistry, Elsevier, 2008/69/12/2374-2379
Résumé
From the bulbils of <i>Dioscorea bulbifera</i> L. var <i>sativa</i>, two clerodane diterpenoids, Bafoudiosbulbins F (<b>1</b>) and G (<b>2</b>), together with five known compounds: Bafoudiosbulbins A–C, 3,5,4′-trihydroxy-3′-methoxybibenzyl, and kaempferol were isolated. Their structures were established by spectroscopic techniques, including <sup>1</sup>H,<sup>13</sup>C NMR, NOESY, ROESY, COSY, TOCSY, HSQC, and HMBC. The relative stereochemistry of compounds <b>1</b> and <b>2</b> was assigned on the basis of X-ray crystallographic diffraction analysis. Furthermore, the structure of Bafoudiosbulbin B was revised using extensive 2D NMR techniques as well as chemical transformation.
Identifiants
Type de publication
journal article
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