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Treatment of alpha,beta-unsaturated ketones with CF(3)I in the presence of Et(2)Zn and RhCl(PPh(3))(3) gave novel alpha-trifluoromethylation products in good yields. Hydrogen transfer from the ethyl group on the rhodium complex to the beta-position of the enone seems to play an important role in this reaction.
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Sato et al. (2004) studied this question.
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