Journal
TETRAHEDRON
Volume 60, Issue 11, Pages 2647-2655Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2004.01.023
Keywords
flavones; hydroxylation; dioxirane
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The flavone nucleus is part of a large number of natural products and medicinal compounds. In this presentation the novel regioselective hydroxylation of hydroxyarenes with DMD is described. The results showed further that flavonoids with 5-hydroxy group were selectively oxyfunctionalized at the para-position C8 carbon atom by DMD. Finally, according to this methodology, the naturally occurring isosinensetin, tangeretin, sinensetin, nobiletin, natsudaidain, gardenin B, 3,3',4',5,6,7,8-heptamethoxyflavone, quercetin and its derivatives were synthesized. (C) 2004 Elsevier Ltd. All rights reserved.
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