Gg. Bargamov et al., POLYFLUORINATED HYDRAZONES IN ORGANIC-SYNTHESIS .1. OXIDATION OF ,5,5-HEXAFLUORO-4-TRIFLUOROMETHYLPENTANE-2,3-DIONE DIHYDRAZONE WITH BROMINE, Russian chemical bulletin, 43(11), 1994, pp. 1928-1930
A preparative one-step method for the synthesis of ,5,5-hexafluoro-4-t
rifluoromethylpentane-2,3-dione dihydrazone from perfluoro-4-methylpen
t-2-ene and hydrazine hydrate has been developed. Oxidation of this di
hydrazone with bromine in water gives 1,5,5,5-hexafluoro-4-trifluorome
thylpentane-2-one. The same product is obtained from ,1,5,5,5-hexafluo
ro-4-trifluoromethylpentane-2-one under similar conditions.