## Abstract The scope of the nucleophilic aromatic __ortho__‐fluorinations from the corresponding __ortho__‐halonitrobenzene precursors (halo‐to‐fluoro substitutions) with no‐carrier‐added [^18^F]fluoride ion as its activated K[^18^F]F–K~222~ complex has been evaluated via the radiosynthesis of __o
The comparative synthesis of 18F-fluorophenylalanines by electrophilic substitution with 18F-F2 and 18F-AcOF
✍ Scribed by M. Murakami; K. Takahashi; Y. Kondo; S. Mizusawa; H. Nakamichi; H. Sasaki; E. Hagami; H. Iida; I. Kanno; S. Miura; K. Uemura
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- French
- Weight
- 181 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
Fluorination with 18F-F2 and 18F-AcOF were compared for the synthesis of 18F-fluorophenylalanines. L-phenylalanine in CF,COOH trapped 18F-AcOF more effectively than 18F-F2. The main product was ortho-18F-fluorophenylalanine when 18F-AcOF was used as a reagent. Lower radiochemical yield of 18F-fluorophenylalanines and si nificant formation of by-product were observed in the case o f feF-F,.
📜 SIMILAR VOLUMES
## Abstract Compared to homoaromatic and aliphatic nucleophilic radiofluorinations, only few references can be found in the literature describing nucleophilic substitutions with [^18^F]fluoride ion of heteroaromatic compounds such as pyridines and only reactions involving fluorination processes at
## Abstract [^18^F]Fluoroethyl bromide ([^18^F]FEtBr) is a useful synthetic precursor to synthesize ^18^F‐labeled compounds. However, the lower reactivity of [^18^F]FEtBr with amine, phenol and amide functional groups than that of [^11^C]CH~3~I partly limits its wide application in the synthesis of
The scope of the nucleophilic aromatic substitution reaction of 2-substituted pyridines with nocarrier-added [ \(\left.{ }^{13} \mathrm{~F}\right]\) fluoride ion (half life : 110 minutes) as its \(\left[{ }^{18} \mathrm{~F}\right] \mathrm{FK}-\mathrm{K}_{222}\) activated complex, has been evaluated