- Regioselective hydroxylation of 2-hydroxychalcones by dimethyldioxirane towards polymethoxylated flavonoids
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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.
- Chu, Han-Wei,Wu, Huan-Ting,Lee, Yean-Jang
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p. 2647 - 2655
(2007/10/03)
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- Syntheses of 6-Hydroxyluteolin and Sinensetin by Wessely - Moser Rearrangement
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Syntheses of 6-hydroxyluteolin (1) and sinensetin (2) are described.The compounds 6 and 7 afford 1 on Wessely - Moser rearrangement.The synthetic samples 1 and 2 are identical (m.m.p. and co-ir) with the authentic samples.
- Shaw, S. C.,Azad, R.,Mandal, S. P.,Gandhi, R. S.
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p. 107 - 109
(2007/10/02)
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