We elaborated simple and efficient method for the synthesis of 2-(3,3,3-trifluoroacetonyl) chromones and isoflavones. This method involves an initial in situ generation of the vinyl ethers from 2-methyl- or 2-ethylchromones/isoflavones and their subsequent acylation with trifluoroacetic anhydride in the presence of CF3COOK. This pathway provides convenient access to novel fluorinated analogs of naturally occurring chromones with good yield
