ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Direct Synthesis of 5,7-Dihydroxy-6-methoxyflavones, II. Synthesis of Flavones from eupatorium Species, IIFrom the five flavones and flavonols isolated from Eupatorium species and not synthesized hitherto the following compounds were synthesized and confirmed in their structures: eupatilin (5,7-dihydroxy-3′,4′,6-trimethoxyflavone) (2a) by the SeO2-oxidation method, eupalitin (3,4′,5-trihydroxy- 6,7-dimethoxyflavone) (4a), eupatolitin (3,3′,4′,5 tetrahydroxy-6,7-dimethoxyflavone) (5a). eupatoretin (3,3′-dihydroxy-4′,5,6,7-tetramethoxyflavone) (6). and eupatin (3,3′5-trihydroxy-4′,6,7-trimethoxyflavone) (7) by a modified AFO-oxidation of the corresponding chalkones.
Notes:
Von den fünf bisher noch nicht synthetisch dargestellten Flavonen und Flavonolen aus Eupatorium-Arten wurden Eupatilin (5,7 -Dihydroxy-3′,4′,6-trimethoxyflavon) (2a) nach der SeO2-Oxidations-Methode, Eupalitin (3,4′,5 -Trihydroxy-6,7-dimethoxyflavon) (4a), Eupatolitin (3,3′,4′,5-Tetrahydroxy-6,7-dimethoxyflavon) (5a), Eupatoretin (3,3′-Dihydroxy-4′,5,6,7-tetramethoxyflavon) (6)und Eupatin (3,3′,5-Trihydroxy-4′,6,7-trimethoxyflavon) (7) aus den entsprechenden Chalkonen nach einer modifizierten AFO-Oxidations -Methode synthetisiert und in ihrer Struktur bewiesen.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19741070333
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