Catalyst-free,direct electrochemical trifluoromethylation/cyclization of N-arylacrylamides using TfN

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A new electrochemical strategy for trifluoromethylation/cyclization using TfNHNHBoc as a CF3 source was established.This approach was realized by the direct electrolysis of TfNHNHBoc under external oxidant-free and catalyst-free conditions,and afforded various trifluoromethylated oxindoles with good functional group compatibility and broad substrate scope.Preliminary mechanistic studies show that the reaction proceeds by a radical process.
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