2‐Perfluoroalkanoylcyclopentane‐1,3‐diones. Synthesis and Some Transformations.

The title compounds (III) are synthesized for the first time by acylation of cyclopentane-1,3-dione (I) with perfluorocarboxylic acids in the presence of CDI or with perfluorocarboxylic anhydrides in the presence of imidazole.