Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 348, Issue 1-2, Pages 63-67Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.200505223
Keywords
3-bromoflavones; N-bromosuccinimide; flavanones; flavones; microwave irradiation
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This paper presents the first report of a highly selective transformation of flavanones to 3-bromoflavones or flavones by microwave irradiation of the corresponding flavanone reactants and N-bromosuccinimide (NBS) in the presence of a catalytic amount of 2,2'-azobis(isobutyronitrile) (AIBN). The combination of good to excellent yields, shorter reaction time (10 min), and high levels of functional group compatibility make this an attractive synthetic approach to 3-bromoflavones and flavones.
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