Light-promoted metal-free cross dehydrogenative couplings on ethers mediated by NFSI: reactivity and mechanistic studies
2017
Beniazza, Redouane | Abadie, Baptiste | Remisse, Lionel | Jardel, Damien | Lastécouères, Dominique | Vincent, Jean-Marc
Cross dehydrogenative couplings on ethers occur very effectively using N-fluorobis(phenyl)sulfonimide (NFSI) as oxidizing agent under UVA irradiation in the presence of 2 mol% benzophenone. The reaction was shown to proceed first by fast radical fluorination of the α-C–H bond of ethers, followed by HF elimination to yield the highly electrophilic oxocarbenium ion as a key intermediate.
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