Ligand coupling route to isoflavanones and isoflavones
01 Jan 1992-Journal of The Chemical Society, Chemical Communications (The Royal Society of Chemistry)-Iss: 3, pp 224-225
Abstract: Phenylation of 3-phenylsulfonlylchroman-4-ones using Ph3BiCO3leading to the synthesis of isoflavanones and isoflavones is reported.
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Topics: Ketone (51%), Isoflavones (50%)
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Abstract: Arylation of A- ring substituted and unsubstituted 3-allyloxycarbonylchroman-4-ones with aryllead (IV) triacetates followed by selective catalytic deallyloxycarbonylation affords isoflavanones or isoflavones in high overall yields. The highest yield in the arylation step was observed in the reaction of 5,7-dimethoxychroman-4-one with the more hindered 2,4,6-trimethoxyphenyllead triacetate.
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Abstract: Photoinduced electron-transfer reaction between excited β-ketosulfones and ascorbic acid provides an efficient and green approach for the desulfonylation of β-ketosulfones.
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Abstract: Syntheses a partir du chlorure d'acide benzodioxole-1,3acetique-5 (ou de son derive methoxy-6) et de dimethyl-2,2 chromannol-3, resorcinol ou isoprenyloxy-3 phenol
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