Silver-Mediated 18F-Labeling of Aryl-CF3 and Aryl-CHF2 with 18F-Fluoride
2015
We report the synthesis of [ 18 F]arylCF 3 and [ 18 F]arylCHF 2 derivatives from arylCF 2 Br and arylCHFCl precursors applying a silver-mediated halogen exchange with [ 18 F]fluoride. In the absence of Ag(I)OTf, no reaction takes place at room temperature for both classes of substrates; this result demonstrates the beneficial role of silver(I) as a means to induce 18 F-incorporation under very mild conditions.
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