Harvesting 18F-fluoride ions in water via direct 18F19F isotopic exchange: radiofluorination of zwitterionic aryltrifluoroborates and in vivo stability studies
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In this report, we show that [18F]-zwitterionic aryltrifluoroborates with ortho-phosphonium groups are: (i) easily accessible via direct 18F-19F isotopic exchange reactions in aqueous solutions; and (ii) efficiently stabilized in vivo against fluoride ion dissociation. 2012 The Royal Society of Chemistry.