Comparative study of the catalytic preparation of flavones using Keggin heteropolyacids under homogeneous, heterogeneous and solvent free conditions
ABSTRACT Keggin heteropolyacids are found to be selective and recyclable catalysts for the preparation of flavones. The reaction was
carried out in different reaction media, homogeneous, heterogeneous and solvent-free conditions. The solvent-free conditions
represent the best green conditions.
KeywordsFlavones-Keggin heteropolyacids-Homogeneous catalyst-Heterogeneous catalyst-Solvent free conditions