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Potassium bromodifluoroacetate, which can be obtained from readily available ethyl ester, can be a practical alternative to Me3SiCF2Br in reaction with organozincs. Potassium bromodifluoroacetate could be used to synthesise gem-difluorinated compounds from organozinc reagents. Potassium bromodifluoroacetate serves as a source of CF2-fragment, which is inserted into the carbon single bondzinc bond of organozinc reagents. The intermediate difluorinated organozinc species can be protonated, brominated or coupled with allylic electrophiles[1].

[1] Vitalij V. Levin. “Reactions of organozinc reagents with potassium bromodifluoroacetate.” Journal of Fluorine Chemistry 171 (2015): Pages 97-101.