Iodine catalyzed cascade synthesis of flavone derivatives from 2'-allyloxy-α, β-dibromochalcones

• BEENA R NAWGHARE ^[1] ; SUNIL V GAIKWAD ^[1] ; ABDUL RAHEEM ^[1] ; PRADEEP D LOKHANDE ^[1]
  1. [1] University of Pune

     University of Pune

     India

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 59, Nº. 1, 2014, págs. 2284-2286
• Idioma: inglés
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• Resumen

  • Synthesis of flavones from 2'-allyloxy-α, β-dibromochalcones has been described. The iodine induced oxidative cyclization of 2'-allyloxy-α, β-dibromochalcones results into the formation of 3-bromoflavanones which ultimately gives flavones. Dehydrobromination of 3-bromoflavanone to give flavone is the preferred reaction over dehydrogenation.