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| Hauptseite > Publikationsdatenbank > The Efficient Preparation of Radiolabeled Aromatic Amino Acids via Cu-Mediated Radiofluorination using Ni-complexes > print |
| Hauptseite > Publikationsdatenbank > The Efficient Preparation of Radiolabeled Aromatic Amino Acids via Cu-Mediated Radiofluorination using Ni-complexes > print |
| 001 | 865321 | ||
| 005 | 20210130003015.0 | ||
| 024 | 7 | _ | |a 10.1055/s-0039-1683568 |2 doi |
| 037 | _ | _ | |a FZJ-2019-04823 |
| 041 | _ | _ | |a German |
| 100 | 1 | _ | |a Craig, A. |0 P:(DE-Juel1)176281 |b 0 |e Corresponding author |u fzj |
| 111 | 2 | _ | |a 57. Jahrestagung der Deutschen Gesellschaft für Nuklearmedizin |g NuklearMedizin 2019 |c Bremen |d 2019-04-03 - 2019-04-06 |w Germany |
| 245 | _ | _ | |a The Efficient Preparation of Radiolabeled Aromatic Amino Acids via Cu-Mediated Radiofluorination using Ni-complexes |
| 260 | _ | _ | |c 2019 |
| 336 | 7 | _ | |a Conference Paper |0 33 |2 EndNote |
| 336 | 7 | _ | |a Other |2 DataCite |
| 336 | 7 | _ | |a INPROCEEDINGS |2 BibTeX |
| 336 | 7 | _ | |a conferenceObject |2 DRIVER |
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| 520 | _ | _ | |a Ziel/Aim:The aim of this work was to develop a procedure for the preparation of F-18-labeled aromatic amino acids (AAA) via alcohol-enhanced Cu-mediated radiofluorination using Ni-BPX auxiliaries as easily-removable dual-protecting groups.Methodik/Methods:The Bpin-substituted precursors of radiofluorinated AAA and α-Me-AAA were prepared by alkylation of (S)-Ni-BPB-Gly and (S)-Ni-BPA-(RS)-Ala with the corresponding Bpin-substituted benzyl bromides. Radiolabeling was carried out according to the protocol for alcohol-enhanced1 Cu-mediated radiofluorination as follows: F-18-F- was loaded onto a QMA-cartridge which was subsequently washed with MeOH; F-18-F- was eluted with Et4NHCO3 to a solution of Cu(py)4(OTf)2 and precursor in DMF/nBuOH (2:1), and the reaction mixture was stirred under air at 110 °C for 10 min. Evaporation of the DMA/nBuOH was followed by deprotection using 12 M HCl at 110 °C for 15 min. The acidic solution was evaporated and the tracer was isolated by HPLC.Ergebnisse/Results:Ni complexes containing 2 – 4-F-18-FPhe, 2 – 4-aMe-F-18-FPhe, 6-F-18-FMT, aMe-6-F-18-FMT, 4-F-18-FTrp and 2-Me-F-18-FTyr residues were obtained in RCCs of 50 – 95%. The purified tracers were isolated in n.d.c 15 – 25% RCYs in excellent radiochemical and enantiomeric purity. Radiosyntheses of 4-F-18-FPhe and 4-F-18-FTrp were implemented to an automated module furnishing tracers in n.d.c RCYs of 25% and 17%, respectively, within 75 – 80 min.Schlussfolgerungen/Conclusions:Alcohol-enhanced Cu-mediated radiofluorination of BPin substituted Ni-BPX-AAA complexes is a simple, yet powerful method for the fast production of structurally diverse radiolabeled AAAs and alpha-methyl substituted AAAs. The attractiveness of the procedure is highlighted by the accessibility of radiolabeling precursors, high RCYs and easy implementation to an automated module.Literatur/References:[1] Zichler, J., Niklas, K., Modemann, D., Neumaier, B., Zlatopolskiy, B.; Chemistry – A European Journal, 2017, 23, 3251 – 3256 |
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| 700 | 1 | _ | |a Kolks, N. |0 P:(DE-Juel1)178654 |b 1 |u fzj |
| 700 | 1 | _ | |a Urusova, E. |0 P:(DE-Juel1)176705 |b 2 |u fzj |
| 700 | 1 | _ | |a Zlatopolskiy, Boris |0 P:(DE-Juel1)176188 |b 3 |u fzj |
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| 773 | _ | _ | |a 10.1055/s-0039-1683568 |
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