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

Autor:	Diego Manuel Ruiz, Gustavo P. Romanelli, Horacio J. Thomas, Juan Carlos Autino, Graciela T. Baronetti, Daniel Oscar Bennardi
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Solvent free Chemistry Microwave heating Organic Chemistry High selectivity Organic chemistry Biochemistry Environmentally friendly Flavones Microwave Catalysis
Zdroj:	Letters in Organic Chemistry. 5:607-615
ISSN:	1570-1786
DOI:	10.2174/157017808786857570
Popis:	Simple, clean, environmentally friendly procedures for the solvent-free preparation of coumarins, dihydrocou- marins, 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 ob- tained. The results are compared with those of the reactions performed under conventional heating.
Databáze:	OpenAIRE
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