| | 1 | Author
| Yusuke Shibuya, Satoshi Tahara, Yutaka Kimura, Junya Mizutani | Requires cookie* | | | Title
| New Isoflavone Glucosides from White Lupin (Lupinus albus L.)  | | | | Abstract
| Further investigation of polar constituents in white lupin roots revealed the presence of genistein 7-O-ß-glucoside (la), genistein 4'-0-ß-glucoside (lb), 2'-hydroxygenistein 7-0-ß-glucoside (2a) and 2'-hydroxygenistein 4'-0-ß-glucoside (2b) as simple isoflavone gluco sides; luteone 7-O-ß-glucoside (3 a), licoisoflavone A 7-O-ß-glucoside (4 a) and licoisoflavone A 4'-0-ß-glucoside (4b) as prenylated (= 3,3-dimethylallyl-substituted) isoflavone glucosides; and genistein 7-0-ß-(6"-0-malonyl)glucoside (lam) and 2'-hydroxygenistein 7-0-ß-(6''-0-malonyl)glueoside (2 am) as malonylated isoflavone glucosides. Six compounds (2 a, 2 b, 3 a, 4a, 4b, and 2am) are new naturally occurring isoflavone glucosides. | | | |
Reference
| Z. Naturforsch. 46c, 513—518 (1991); received February 12/May 2 1991 | | | |
Published
| 1991 | | | |
Keywords
| Isoflavonoids, Malonylglucosides, White Lupin, Lupinus albus, Leguminosae | | | |
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| default:Reihe_C/46/ZNC-1991-46c-0513.pdf | | | | Identifier
| ZNC-1991-46c-0513 | | | | Volume
| 46 | |
| 2 | Author
| M. Asaaki, M. Oriyam, SunaoO. Rihara, L. Ingham, Ju, K. Aw Ab Ata, M. Izutani | Requires cookie* | | | Title
| Naturally Occurring Coumaranochroman-4-ones: a New Class of Isoflavonoids from Lupins and Jamaican Dogwood | | | | Abstract
| A further investigation o f the isoflavonoid com ponents o f Piscidia erythrina, Lupinus alhus and L. luteus has revealed the presence o f 3-hydroxy-and 3-m ethoxy-coumaranochrom an-4-ones. These compounds are the first known representatives o f a new type o f naturally occur ring isoflavonoid. Using a combination o f chemical and spectroscopic methods, the com pounds were identified as 3,5,7,4'-tetrahydroxy-5'-methoxy-3'-(3,3-dimethylallyl)couma-ranochroman-4-one (piscerythrol, 1), 3,5,7,4'-tetrahydroxy-6,3'-di(3,3-dimethylallyl)couma-ranochrom an-4-one (lupinol A, 3), 5,7,4'-trihydroxy-3-methoxy-6,3'-di(3,3-dimethylallyl)-coum aranochrom an-4-one (lupinol B, 6) and 3,5,7,4'-tetrahydroxy-6-(3,3-dimethylallyl)-coum aranochrom an-4-one (lupinol C, 7). All four isoflavonoids were found to have the cis relative configuration at C-2/C-3. Possible biogenetic relationships between the coumarano-chrom an-4-ones and other isoflavonoids (isoflavones and coum aronochrom ones) found in Piscidia and Lupinus are briefly discussed. | | | |
Reference
| Z. Naturforsch. 46c, 331 (1991); received February 28 1991 | | | |
Published
| 1991 | | | |
Keywords
| Leguminosae, Lupinus, Piscidia erythrina, Isoflavonoids, Coumaranochroman-4-ones, Coum aronochrom ones | | | |
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| default:Reihe_C/46/ZNC-1991-46c-0331.pdf | | | | Identifier
| ZNC-1991-46c-0331 | | | | Volume
| 46 | |
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