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Zlatopolskiy BD, Zischler J, Urusova EA, Endepols H, Kordys E, Frauendorf H, Mottaghy FM, Neumaier B. A Practical One-Pot Synthesis of Positron Emission Tomography (PET) Tracers via Nickel-Mediated Radiofluorination. ChemistryOpen 2015; 4:457-62. [PMID: 26478840 PMCID: PMC4603406 DOI: 10.1002/open.201500056] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Indexed: 12/28/2022] Open
Abstract
Recently a novel method for the preparation of (18)F-labeled arenes via oxidative [(18)F]fluorination of easily accessible and sufficiently stable nickel complexes with [(18)F]fluoride under exceptionally mild reaction conditions was published. The suitability of this procedure for the routine preparation of clinically relevant positron emission tomography (PET) tracers, 6-[(18)F]fluorodopamine (6-[(18)F]FDA), 6-[(18)F]fluoro-l-DOPA (6-[(18)F]FDOPA) and 6-[(18)F]fluoro-m-tyrosine (6-[(18)F]FMT), was evaluated. The originally published base-free method was inoperative. However, a "low base" protocol afforded protected radiolabeled intermediates in radiochemical conversions (RCCs) of 5-18 %. The subsequent deprotection step proceeded almost quantitatively (>95 %). The simple one-pot two-step procedure allowed the preparation of clinical doses of 6-[(18)F]FDA and 6-[(18)F]FDOPA within 50 min (12 and 7 % radiochemical yield, respectively). In an unilateral rat model of Parkinsons disease, 6-[(18)F]FDOPA with high specific activity (175 GBq μmol(-1)) prepared using the described nickel-mediated radiofluorination was compared to 6-[(18)F]FDOPA with low specific activity (30 MBq μmol(-1)) produced via conventional electrophilic radiofluorination. Unexpectedly both tracer variants displayed very similar in vivo properties with respect to signal-to-noise ratio and brain distribution, and consequently, the quality of the obtained PET images was almost identical.
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Affiliation(s)
- Boris D Zlatopolskiy
- Institute of Radiochemistry & Experimental Molecular Imaging, University Clinic CologneKerpener Str. 62, 50937, Cologne, Germany
- Max Planck Institute for Metabolism ResearchGleueler Str. 50, 50931, Cologne, Germany
| | - Johannes Zischler
- Institute of Radiochemistry & Experimental Molecular Imaging, University Clinic CologneKerpener Str. 62, 50937, Cologne, Germany
- Max Planck Institute for Metabolism ResearchGleueler Str. 50, 50931, Cologne, Germany
| | - Elizaveta A Urusova
- Institute of Radiochemistry & Experimental Molecular Imaging, University Clinic CologneKerpener Str. 62, 50937, Cologne, Germany
- Max Planck Institute for Metabolism ResearchGleueler Str. 50, 50931, Cologne, Germany
- Clinic of Nuclear Medicine, RWTH Aachen UniversityPauwelsstraße 30, 52074, Aachen, Germany
| | - Heike Endepols
- Institute of Radiochemistry & Experimental Molecular Imaging, University Clinic CologneKerpener Str. 62, 50937, Cologne, Germany
- Max Planck Institute for Metabolism ResearchGleueler Str. 50, 50931, Cologne, Germany
| | - Elena Kordys
- Institute of Radiochemistry & Experimental Molecular Imaging, University Clinic CologneKerpener Str. 62, 50937, Cologne, Germany
- Max Planck Institute for Metabolism ResearchGleueler Str. 50, 50931, Cologne, Germany
| | - Holm Frauendorf
- Institute of Organic & Biomolecular Chemistry, Georg-August UniversityTammannstr. 2, 37077, Göttingen, Germany
| | - Felix M Mottaghy
- Clinic of Nuclear Medicine, RWTH Aachen UniversityPauwelsstraße 30, 52074, Aachen, Germany
- Department of Nuclear Medicine, Maastricht University Medical CenterPO Box 616, 6200, MD Maastricht, The Netherlands
| | - Bernd Neumaier
- Institute of Radiochemistry & Experimental Molecular Imaging, University Clinic CologneKerpener Str. 62, 50937, Cologne, Germany
- Max Planck Institute for Metabolism ResearchGleueler Str. 50, 50931, Cologne, Germany
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Moore TM, Akula MR, Collier L, Kabalka GW. A rapid microfluidic synthesis of [18F]fluoroarenes from nitroarenes. Appl Radiat Isot 2013; 71:47-50. [DOI: 10.1016/j.apradiso.2012.09.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 07/24/2012] [Accepted: 09/17/2012] [Indexed: 11/16/2022]
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Affiliation(s)
- Lisheng Cai
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, Rm. B3 C346, 10 Center Drive, Bethesda, MD 20892‐1003, USA, Fax: +1‐301‐480‐5112
| | - Shuiyu Lu
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, Rm. B3 C346, 10 Center Drive, Bethesda, MD 20892‐1003, USA, Fax: +1‐301‐480‐5112
| | - Victor W. Pike
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Building 10, Rm. B3 C346, 10 Center Drive, Bethesda, MD 20892‐1003, USA, Fax: +1‐301‐480‐5112
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