| 摘要 |
A process for preparing (per)fluorohalogenethers having general formula: <CHEM> wherein: A and A', equal to or different from each other, are selected among Cl, Br, H; m=1, 2; n=0, 1; R1 is a fluorinated substituent, preferably perfluorinated, selected from the following groups: C1-C20 linear or branched alkylic; C3-C7 cycloalkylic; aromatic, C6-C10 arylalkyl; heterocyclic or C5-C10 alkylheterocyclic; preferably perfluoroalkyl; R' is as defined in the application; by reaction of carbonyl compounds having formula: <CHEM> wherein: R1 and n are as above; u=0, 1; R' is as defined in the application; in liquid phase, with elemental fluorine and with olefinic compounds of formula: CAF=CA'F2 wherein A and A' are as above, at temperatures from -120 DEG C to -20 DEG C, preferably from -100 DEG C to -40 DEG C, optionally in the presnece of an inert solvent under the reaction conditions. |
