US Patent 4,582,921
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
The basic single step process for preparing trifluoromethyl organocadmium and zinc compounds from difluorodihalomethane is disclosed. The prepared trifluoromethyl compound may be used to add the trifluoromethyl to a variety of organic structures in a trifluoromethylating reaction. Amongst the structures included are aromatic compounds, halo olefins, allylic compounds, acetylenic compounds and acyl halides.
Burton, Donald J.; Wiemers, Denise M.; and Easdon, Jerome C. Method of preparation of compounds containing perfluoroalkyl groups. US Patent 4,582,921 filed September 17, 1984 and issued April 15, 1986. https://ir.uiowa.edu/patents/41