To overcome the disadvantages of a protonated solvent, the fluorination was conducted according to the method of Freeman." Ib was converted to Vb by formation of the potassio salt in the presence of potassium ethoxide, followed by displacement of the ethanol with dry dimethylformamide (DRIF) and fluorination with perchloryl fluoride. In addition to the expected elemental composition, the infrared spectrum of the product was characterized ...