Fluoroaliphatic esters of fluorosulfonic acid

2,3-bis-fluorosulfatoperfluoroalkanes at the absence of solvents are decomposed under CsF effect resulting in mixture of α-fluorosulfatoperfluoroketones, perfluoroalkenesulphates and perfluoro-α-diketones. These reactions in the solutions result, mainly, in formation of oxides of corresponding fluorolefins and products of their transformations. Realized reactions represent the first example of nucleophilic substitution at secondary carbon atom in perfluorinated saturated chain