To prepare a fluorinated compound containing an oxygenated function, we have consistently introduced the fluorine atoms in a non-oxygenated compound first, then created the oxygenated function afterwards. In so doing, we have frequently been able to take advantage of the directing power of the fluorinated cluster. The syntheses of CRCO2H, and of HO~ C (CF~). CO2K, are examples of this procedure. lS2
