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广西壮族自治区自然科学基金(s0991009)

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发文基金:国家自然科学基金广西壮族自治区自然科学基金更多>>
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Facile Syntheses of 3-Isopentenyl Flavone and 3-Geranyl Flavone被引量:1
2012年
Although there was a strong steric effect,isopentenyl and geranyl moieties were successfully introduced into C3 position in flavone skeleton so as to synthesize the 3-isopentenyl flavone and 3-geranyl flavone under two cyclization conditions(AcOH/HCl and concentrated H 2 SO 4 /MeOH) in this report.It was found that the optimum cyclization conditions for 3-isopentenyl flavone and 3-geranyl flavone were,respectively,AcOH/HCl and H 2 SO 4 /MeOH.Furthermore,the donating electron ability is in the sequence 3-geranyl flavone3-isopentenyl flavone according to the density functional theory(DFT) calculations,suggesting the longer alkyl chain at 3-position would be more favorable for enhancing the donating electron ability.The present synthetic routes might reveal potential applicability in our continued studies on the total syntheses of other natural 3-alkyl flavonoids.
HUANG Chu-shengSHI Jian-chengLIU Hong-xingCHEN QianDUAN Hong-xia
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