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Dahl K, Lindberg A, Vasdev N, Schou M. Reactive Palladium-Ligand Complexes for 11C-Carbonylation at Ambient Pressure: A Breakthrough in Carbon-11 Chemistry. Pharmaceuticals (Basel) 2023; 16:955. [PMID: 37513867 PMCID: PMC10386706 DOI: 10.3390/ph16070955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/30/2023] Open
Abstract
The Pd-Xantphos-mediated 11C-carbonylation protocol (also known as the "Xantphos- method"), due to its simplistic and convenient nature, has facilitated researchers in meeting a longstanding need for preparing 11C-carbonyl-labeled radiopharmaceuticals at ambient pressure for positron emission tomography (PET) imaging and drug discovery. This development could be viewed as a breakthrough in carbon-11 chemistry, as evidenced by the rapid global adoption of the method by the pharmaceutical industry and academic laboratories worldwide. The method has been fully automated for the good manufacturing practice (GMP)-compliant production of novel radiopharmaceuticals for human use, and it has been adapted for "in-loop" reactions and microwave technology; an impressive number of 11C-labeled compounds (>100) have been synthesized. Given the simplicity and efficiency of the method, as well as the abundance of carbonyl groups in bioactive drug molecules, we expect that this methodology will be even more widely adopted in future PET radiopharmaceutical research and drug development.
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Affiliation(s)
- Kenneth Dahl
- PET Science Centre, Precision Medicine and Biosamples, Oncology R&D, AstraZeneca, Karolinska Institutet, SE-17176 Stockholm, Sweden
- Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-17176 Stockholm, Sweden
| | - Anton Lindberg
- Azrieli Centre for Neuro-Radiochemistry, Brain Health Imaging Centre, Centre for Addiction and Mental Health, 250 College St., Toronto, ON M5T1R8, Canada
| | - Neil Vasdev
- Azrieli Centre for Neuro-Radiochemistry, Brain Health Imaging Centre, Centre for Addiction and Mental Health, 250 College St., Toronto, ON M5T1R8, Canada
- Department of Psychiatry, University of Toronto, 250 College St., Toronto, ON M5T1R8, Canada
| | - Magnus Schou
- PET Science Centre, Precision Medicine and Biosamples, Oncology R&D, AstraZeneca, Karolinska Institutet, SE-17176 Stockholm, Sweden
- Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-17176 Stockholm, Sweden
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Cormier M, Tabey A, Christine T, Audrain H, Fouquet E, Hermange P. Synthesis and [*C]CO-labelling of (C,N) gem-dimethylbenzylamine-palladium complexes for potential applications in positron emission tomography. Dalton Trans 2021; 50:10608-10614. [PMID: 34282814 DOI: 10.1039/d1dt01633d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Various aryl-palladium complexes were synthesised from gem-dimethylbenzylamine derivatives by C-H activation under extremely mild conditions. Interestingly, these highly stable structures reacted with [13C]carbon monoxide to produce the desired labelled lactams in 29% to 51% yields over the C-H activation/carbonylation steps. As representative examples, a non-natural amino acid and an estradiol-based conjugate were prepared and labelled in model experiments with [13C]CO in homogeneous or heterogeneous conditions. Especially, the latter was radiolabelled with [11C]CO using a convenient procedure from the resin-supported palladium complex precursor. Thus, these results strongly suggest that cyclometallated palladium complexes obtained from gem-dimethylbenzylamine moieties are promising precursors for the practical synthesis of new [11C]tracers for Positron Emission Tomography.
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Affiliation(s)
- Morgan Cormier
- Univ. Bordeaux, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence Cedex, France.
| | - Alexis Tabey
- Univ. Bordeaux, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence Cedex, France.
| | - Thifanie Christine
- Univ. Bordeaux, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence Cedex, France.
| | - Hélène Audrain
- Department of Nuclear Medicine and PET Center, Aarhus University Hospital, Palle Juul-Jensen Boulevard 165, 8200 Aarhus N, Denmark
| | - Eric Fouquet
- Univ. Bordeaux, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence Cedex, France.
| | - Philippe Hermange
- Univ. Bordeaux, Institut des Sciences Moléculaires, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence Cedex, France.
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Tabey A, Christine T, Fouquet E, Hermange P. Practical synthesis of
13
C‐labeled conjugates by [
13
C]CO‐carbonylation of supported arylbipyridylpalladium complexes and alkyne–azide cycloadditions. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5779] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alexis Tabey
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255 351 Cours de la Libération, 33405 Talence Cedex France
| | - Thifanie Christine
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255 351 Cours de la Libération, 33405 Talence Cedex France
| | - Eric Fouquet
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255 351 Cours de la Libération, 33405 Talence Cedex France
| | - Philippe Hermange
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255 351 Cours de la Libération, 33405 Talence Cedex France
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The chemistry of labeling heterocycles with carbon-11 or fluorine-18 for biomedical imaging. ADVANCES IN HETEROCYCLIC CHEMISTRY 2020. [DOI: 10.1016/bs.aihch.2019.11.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Syntheses of o-iodobenzyl alcohols‒BODIPY structures as potential precursors of bimodal tags for positron emission tomography and optical imaging. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Tabey A, Audrain H, Fouquet E, Hermange P. Bioconjugated arylpalladium complexes on solid supports for a convenient last-step synthesis of 11C-labelled tracers for positron emission tomography. Chem Commun (Camb) 2019; 55:7587-7590. [DOI: 10.1039/c9cc03215k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bioconjugated arylpalladium complexes anchored onto polystyrene beads provided [11C]CO-labelled compounds with excellent radiochemical purities after a simple filtration.
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Affiliation(s)
| | - Hélène Audrain
- Department of Nuclear Medicine and PET Center
- Aarhus University Hospital
- DK-8000 Aarhus
- Denmark
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