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Abstract The copper‐catalyzed azomethine trifluoromethylation of ketone‐derived hydrazones with Togni′s hypervalent iodine(III)‐CF 3 reagent is described. The reaction gives rise to quaternary α‐trifluoromethyl diazenes under mild conditions and is proposed to proceed via a radical process.
Prieto et al. (Fri,) studied this question.