Efficient Microwave Solvent-Free Synthesis of Flavones, Chromones, Coumarins and Dihydrocoumarins

Simple, clean, environmentally friendly procedures for the solvent-free preparation of coumarins, dihydrocoumarins, flavones and chromones under microwave heating are described. Silica-supported Wells-Dawson heteropolyacid (H6P2W18O62·24 H2O) was employed as catalyst. High selectivity, very good yie...

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Detalles Bibliográficos
Autores principales: Bennardi, Daniel Oscar, Ruiz, Diego Manuel, Romanelli, Gustavo Pablo, Baronetti, Graciela Teresita, Thomas, Horacio Jorge, Autino, Juan Carlos
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Química
Acid catalysis
chromones
coumarins
dihydrocoumarins
flavones
microwave
solvent-free
Wells-Dawson heteropolyacid
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/164071
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:Simple, clean, environmentally friendly procedures for the solvent-free preparation of coumarins, dihydrocoumarins, flavones and chromones under microwave heating are described. Silica-supported Wells-Dawson heteropolyacid (H6P2W18O62·24 H2O) was employed as catalyst. High selectivity, very good yields and short reaction times were obtained. The results are compared with those of the reactions performed under conventional heating.

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