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In a recent contribution from Makosza and co-workers, pyridinium salts were shown to be active electrophiles for the interaction with Me 3-SiCF3 activated by KF/Ph3SnF; see: Loska, R, Majcher, M, Makosza, M. J. Org. Chem. 2007, 72, 5574
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3SnF; see: Loska, R.; Majcher, M.; Makosza, M. J. Org. Chem. 2007, 72, 5574.
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35548929791
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It was demonstrated by Mukaiyama that for successful activation of Me3SiCF3 by acetate anion it is necessary to employ sodium or potassium acetate in DMF or tetrabutylammonium acetate in any other solvent, thereby suggesting that the role of DMF is merely to solvate the alkali metal cation; see ref 6b
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3 by acetate anion it is necessary to employ sodium or potassium acetate in DMF or tetrabutylammonium acetate in any other solvent, thereby suggesting that the role of DMF is merely to solvate the alkali metal cation; see ref 6b.
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