Synthesis of substituted flavones and arylchromones using P and Si Keggin heteropolyacids as catalysts
A simple and clean procedure for the preparation of functionalized flavones and chromones using commercial Keggin heteropolyacid in acetonitrile medium is described for the cyclization of l-(2- hydroxyaiyl)-3-aryl-l,3-propanodiones. Sixteen examples are reported, yields ranging in 60-91%; five subst...
Guardado en:
| Autores principales: | , , , , , |
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| Formato: | Articulo Comunicacion |
| Lenguaje: | Inglés |
| Publicado: |
2007
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/120067 |
| Aporte de: |
| Sumario: | A simple and clean procedure for the preparation of functionalized flavones and chromones using commercial Keggin heteropolyacid in acetonitrile medium is described for the cyclization of l-(2- hydroxyaiyl)-3-aryl-l,3-propanodiones. Sixteen examples are reported, yields ranging in 60-91%; five substituted 2-naphthyIchromones are prepared for the first time. |
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