A solvent-free synthesis of coumarins using a Wells-Dawson heteropolyacid as catalyst

Seventeen examples are resolved, most of them in good to excellent yields, using the cheap WD catalyst. Substituted coumarins are synthesized from phenols and β-ketoesters by the Pechmann reaction, using a Wells-Dawson heteropolyacid (H 6P 2W 18O 62• 24H 2O) as catalyst by a solvent-free procedure....

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Detalles Bibliográficos
Autores principales:	Romanelli, G.P., Bennardi, D., Ruiz, D.M., Baronetti, G., Thomas, H.J., Autino, J.C.
Formato:	JOUR
Materias:	4-Methylumbelliferone Coumarin Heteropolyacid Pechmann reaction Wells-Dawson catalyst coumarin derivative solvent toluene article catalyst drug synthesis high temperature polymerization quantum yield reaction analysis substitution reaction temperature dependence
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00404039_v45_n48_p8935_Romanelli
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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