Perfluorovinyl copper reagents

Reductive coupling reaction of fluorinated vinyl iodides or bromides has been used as a route to fluorinated dienes [246, 247, 248, 249, 250]. Generally, the vinyl iodide is heated with copper metal in DMSO or DMF no i ntermediate perfluorovinyl-copper reagent is detected. Typical examples are shown in equations 163-165 [246, 247, 249], The X-ray crystal structure of perfluorotetracyclobutacyclooctatetraene, prepared via coupling of tetrafluoro-l,2-dnodocyclobutene with copper, is planar... 

Perfluorovinyl Copper Reagents. The F-vinyl cadmium and zinc reagents outlined previously, could be rea y prepared from F-vinyl halides wiAout significant formation of Aenes. Subsequent metaAesis of Ae F-vinyl cadmium and zinc reagents in DMF wiA Cu(I) halides stereospecifically gives a solution of a stable F-vinyl... 

Perfluorovinyl Cadmium Reagents. In order to achieve the formation of the F-vinyl copper reagent in the absence of F-vinyl halide, we turned to the formation of a F-vinyl organometallic reagent that does not readily couple witii vinyl halides. We... 

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