| Popis: |
New bis(polyfluoroalkyl)diazomethanes have been obtained in high yield by the oxidation of polyfluorinated ketone hydrazones with bromine in water. A one-step preparative procedure for obtaining hexafluoroisopropylpentafluoroethylketone hydrazone from perfluoro-2-methyl-pent-2-ene and hydrazine hydrate has been worked out. Some reactions of the diazo compounds obtained, such as thermolysis, catalytic decomposition under the action of Et 3 N and interaction with P(OR) 3 and PPh 3 , have been studied. Diazomethane with the 1- H -hexafluoroisopropyl group has been shown to be a suitable starting material for the preparation of the previously unobtainable perfluoro-1,2-dialkyl-substituted cyclopropene. |
