Authors:Daniel Bennardi, Gustavo Romanelli, Juan Autino, Luis Pizzio, Patricia Vázquez, Cármen Cáceres, and Mirta Blanco
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.