1
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Ford J, Ortalli S, Chen Z, Sap JBI, Tredwell M, Gouverneur V. Expedient Access to 18F-Fluoroheteroarenes via Deaminative Radiofluorination of Aniline-Derived Pyridinium Salts. Angew Chem Int Ed Engl 2024; 63:e202404945. [PMID: 38624193 DOI: 10.1002/anie.202404945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/15/2024] [Accepted: 04/15/2024] [Indexed: 04/17/2024]
Abstract
Herein, we disclose that pyridinium salts derived from abundant (hetero)anilines represent a novel precursor class for nucleophilic aromatic substitution reactions with [18F]fluoride. The value of this new 18F-fluorodeamination is demonstrated with the synthesis of over 30 structurally diverse and complex heteroaryl 18F-fluorides, several derived from scaffolds that were yet to be labelled with fluorine-18. The protocol tolerates heteroarenes and functionalities commonly found in drug discovery libraries, and is amenable to scale-up and automation on a commercial radiosynthesiser.
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Affiliation(s)
- Joseph Ford
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, United Kingdom
| | - Sebastiano Ortalli
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, United Kingdom
| | - Zijun Chen
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, United Kingdom
| | - Jeroen B I Sap
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, United Kingdom
- Current address: Department of Translational Imaging, Genentech Inc., 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Matthew Tredwell
- Wales Research and Diagnostic PET Imaging Centre, Cardiff University, University Hospital of Wales, Heath Park, Cardiff, CF14 4XN, United Kingdom
- School of Chemistry, Cardiff University Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Véronique Gouverneur
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, United Kingdom
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2
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Mkrtchyan S, Shalimov O, Garcia MG, Zapletal J, Iaroshenko VO. Mechanochemical synthesis of aromatic ketones: pyrylium tetrafluoroborate mediated deaminative arylation of amides. Chem Sci 2024; 15:9155-9163. [PMID: 38903233 PMCID: PMC11186303 DOI: 10.1039/d4sc00904e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 04/30/2024] [Indexed: 06/22/2024] Open
Abstract
A new method has been introduced that is able to tackle the complexities of N-C(O) activation in amide moieties through utilization of pyrylium tetrafluoroborate in a mechanochemical setting, where amide bonds undergo activation and subsequent conversion to biaryl ketones. Due to the employment of a mechanochemical setting, the reaction conforms to green chemistry principles, offering an environmentally friendly approach to traditional amide derivatization techniques that rely on transition metals to achieve further functionalization.
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Affiliation(s)
- Satenik Mkrtchyan
- Department of Chemistry, Faculty of Natural Sciences, Matej Bel University Tajovského 40 97401 Banska Bystrica Slovakia
| | - Oleksandr Shalimov
- Department of Heteroatom Chemistry, Institute of Organic Chemistry, National Academy of Sciences of Ukraine 5 Murmans'ka 02660 Kyiv Ukraine
| | - Michael G Garcia
- Department of Biology/Chemistry, Center for Cellular Nanoanalytics (CellNanOs), Universität Osnabrück Barbarastr. 7 D-49076 Osnabrück Germany
| | - Jiří Zapletal
- Department of Chemistry, Faculty of Natural Sciences, Matej Bel University Tajovského 40 97401 Banska Bystrica Slovakia
| | - Viktor O Iaroshenko
- Department of Chemistry, Faculty of Natural Sciences, Matej Bel University Tajovského 40 97401 Banska Bystrica Slovakia
- Division of Wood Chemistry and Pulp Technology, Department of Fiber and Polymer Technology, School of Chemistry, Biotechnology and Health, KTH Royal Institute of Technology Teknikringen 56-58 SE-100 44 Stockholm Sweden
- Functional Materials Group, Gulf University for Science and Technology Mubarak Al-Abdullah 32093 Kuwait
- Centre of Research Impact and Outcome, Chitkara University Institute of Engineering and Technology, Chitkara University Rajpura 140401 Punjab India
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3
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Dillemuth P, Karskela T, Ayo A, Ponkamo J, Kunnas J, Rajander J, Tynninen O, Roivainen A, Laakkonen P, Airaksinen AJ, Li XG. Radiosynthesis, structural identification and in vitro tissue binding study of [ 18F]FNA-S-ACooP, a novel radiopeptide for targeted PET imaging of fatty acid binding protein 3. EJNMMI Radiopharm Chem 2024; 9:16. [PMID: 38393497 PMCID: PMC10891031 DOI: 10.1186/s41181-024-00245-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND Fatty acid binding protein 3 (FABP3) is a target with clinical relevance and the peptide ligand ACooP has been identified for FABP3 targeting. ACooP is a linear decapeptide containing a free amino and thiol group, which provides opportunities for conjugation. This work is to develop methods for radiolabeling of ACooP with fluorine-18 (18F) for positron emission tomography (PET) applications, and evaluate the binding of the radiolabeled ACooP in human tumor tissue sections with high FABP3 expression. RESULTS The prosthetic compound 6-[18F]fluoronicotinic acid 4-nitrophenyl ester was conveniently prepared with an on-resin 18F-fluorination in 29.9% radiochemical yield and 96.6% radiochemical purity. Interestingly, 6-[18F]fluoronicotinic acid 4-nitrophenyl ester conjugated to ACooP exclusively by S-acylation instead of the expected N-acylation, and the chemical identity of the product [18F]FNA-S-ACooP was confirmed. In the in vitro binding experiments, [18F]FNA-S-ACooP exhibited heterogeneous and high focal binding in malignant tissue sections, where we also observed abundant FABP3 positivity by immunofluorescence staining. Blocking study further confirmed the [18F]FNA-S-ACooP binding specificity. CONCLUSIONS FABP3 targeted ACooP peptide was successfully radiolabeled by S-acylation using 6-[18F]fluoronicotinic acid 4-nitrophenyl ester as the prosthetic compound. The tissue binding and blocking studies together with anti-FABP3 immunostaining confirmed [18F]FNA-S-ACooP binding specificity. Further preclinical studies of [18F]FNA-S-ACooP are warranted.
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Affiliation(s)
- Pyry Dillemuth
- Turku PET Centre and Department of Chemistry, University of Turku, Turku, Finland
| | - Tuomas Karskela
- Turku PET Centre and Department of Chemistry, University of Turku, Turku, Finland
| | - Abiodun Ayo
- Translational Cancer Medicine Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Jesse Ponkamo
- Turku PET Centre and Department of Chemistry, University of Turku, Turku, Finland
| | - Jonne Kunnas
- Turku PET Centre and Department of Chemistry, University of Turku, Turku, Finland
- Pharmaceutical Sciences Laboratory, Faculty of Sciences and Engineering, Åbo Akademi University, Turku, Finland
| | - Johan Rajander
- Accelerator Laboratory, Åbo Akademi University, Turku, Finland
| | - Olli Tynninen
- Department of Pathology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Anne Roivainen
- Turku PET Centre, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520, Turku, Finland
- Turku Center for Disease Modeling, University of Turku, Turku, Finland
- InFLAMES Research Flagship, University of Turku, Turku, Finland
| | - Pirjo Laakkonen
- Translational Cancer Medicine Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Laboratory Animal Centre, HiLIFE University of Helsinki, Helsinki, Finland
- iCAN Flagship Program, University of Helsinki, Helsinki, Finland
| | - Anu J Airaksinen
- Turku PET Centre and Department of Chemistry, University of Turku, Turku, Finland
| | - Xiang-Guo Li
- Turku PET Centre and Department of Chemistry, University of Turku, Turku, Finland.
- Turku PET Centre, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520, Turku, Finland.
- InFLAMES Research Flagship, University of Turku, Turku, Finland.
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4
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Huang G, Lu X, Qiu Y, Bi L, Ye P, Yang M, Shen Y, Jin H, Han J. Hetero-aryl bromide precursor fluorine-18 radiosynthesis and preclinical evaluation of a novel positron emission tomography (PET) tracer [ 18F]GSK1482160. Bioorg Med Chem 2022; 73:116996. [PMID: 36126443 DOI: 10.1016/j.bmc.2022.116996] [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: 07/19/2022] [Revised: 08/25/2022] [Accepted: 08/29/2022] [Indexed: 11/26/2022]
Abstract
The purinergic P2X7 receptor (P2X7R), an ATP gated ion channel, is an important therapeutic target for various inflammatory immune and neurodegenerative diseases. A novel P2X7R targeting radiotracer GSK1482160 was radiosynthesized by hetero-aryl bromides precursor 10 with [18F]Et4NF, 20-30 % radiochemical yield, > 68 GBq/μmol specific activity, >98 % radiochemical purity. Evaluation in healthy male Sprague-Dawley rats revealed that [18F]GSK1482160 ([18F]11) was stably retained 87.81 %, 72.45 %, and 56.32 % in brain, blood and liver respectively 60-min post-injection. Ex-vivo biodistribution of [18F]11 proved that it was able to target the P2X7R in vivo and there was no defluorination in the major organs. PET/MRI imaging and autoradiography revealed that [18F]11 was able to penetrate the blood-brain barrier (BBB) and to be a promising P2X7R PET radioligand for clinical translation.
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Affiliation(s)
- Guolong Huang
- Institute of Radiation Medicine, Fudan University, Xietu Road 2094, Shanghai 200032, China; Guangdong Provincial Key Laboratory of Biomedical Imaging, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province 519000, China
| | - Xiaolei Lu
- Institute of Radiation Medicine, Fudan University, Xietu Road 2094, Shanghai 200032, China
| | - Yifan Qiu
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province 519000, China
| | - Lei Bi
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province 519000, China
| | - Peizhen Ye
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province 519000, China
| | - Min Yang
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province 519000, China
| | - Yanfang Shen
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province 519000, China
| | - Hongjun Jin
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong Province 519000, China
| | - Junbin Han
- Institute of Radiation Medicine, Fudan University, Xietu Road 2094, Shanghai 200032, China.
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5
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Qiu L, Jiang H, Yu Y, Gu J, Wang J, Zhao H, Huang T, Gropler RJ, Klein RS, Perlmutter JS, Tu Z. Radiosynthesis and evaluation of a fluorine-18 radiotracer [ 18F]FS1P1 for imaging sphingosine-1-phosphate receptor 1. Org Biomol Chem 2022; 20:1041-1052. [PMID: 35029272 PMCID: PMC8970350 DOI: 10.1039/d1ob02225c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Assessment of sphingosine-1-phosphate receptor 1 (S1PR1) expression could be a unique tool to determine the neuroinflammatory status for central nervous system (CNS) disorders. Our preclinical results indicate that PET imaging with [11C]CS1P1 radiotracer can quantitatively measure S1PR1 expression changes in different animal models of inflammatory diseases. Here we developed a multiple step F-18 labeling strategy to synthesize the radiotracer [18F]FS1P1, sharing the same structure with [11C]CS1P1. We explored a wide range of reaction conditions for the nucleophilic radiofluorination starting with the key ortho-nitrobenzaldehyde precursor 10. The tertiary amine additive TMEDA proved crucial to achieve high radiochemical yield of ortho-[18F]fluorobenzaldehyde [18F]12 starting with a small amount of precursor. Based on [18F]12, a further four-step modification was applied in one-pot to generate the target radiotracer [18F]FS1P1 with 30-50% radiochemical yield, >95% chemical and radiochemical purity, and a high molar activity (37-166.5 GBq μmol-1, decay corrected to end of synthesis, EOS). Subsequently, tissue distribution of [18F]FS1P1 in rats showed a high brain uptake (ID% g-1) of 0.48 ± 0.06 at 5 min, and bone uptake of 0.27 ± 0.03, 0.11 ± 0.02 at 5, and 120 min respectively, suggesting no in vivo defluorination. MicroPET studies showed [18F]FS1P1 has high macaque brain uptake with a standard uptake value (SUV) of ∼2.3 at 120 min. Radiometabolite analysis of macaque plasma samples indicated that [18F]FS1P1 has good metabolic stability, and no major radiometabolite confounded PET measurements of S1PR1 in nonhuman primate brain. Overall, [18F]FS1P1 is a promising F-18 S1PR1 radiotracer worthy of further clinical investigation for human use.
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Affiliation(s)
- Lin Qiu
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Hao Jiang
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Yanbo Yu
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Jiwei Gu
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Jinzhi Wang
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Haiyang Zhao
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Tianyu Huang
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Robert J Gropler
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
| | - Robyn S Klein
- Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri 63110, USA
- Departments of Neuroscience, Washington University School of Medicine, Saint Louis, MO 63110, USA
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Joel S Perlmutter
- Departments of Neuroscience, Washington University School of Medicine, Saint Louis, MO 63110, USA
- Department of Neurology, Washington University School of Medicine, Saint Louis, MO 63110, USA
- Physical Therapy and Occupational Therapy, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Zhude Tu
- Department of Radiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
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6
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Lee SJ, Morales-Colón MT, Brooks AF, Wright JS, Makaravage KJ, Scott PJH, Sanford MS. S NAr Radiofluorination with In Situ Generated [ 18F]Tetramethylammonium Fluoride. J Org Chem 2021; 86:14121-14130. [PMID: 34505779 DOI: 10.1021/acs.joc.1c01491] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This report describes a method for the nucleophilic radiofluorination of (hetero)aryl chlorides, (hetero)aryl triflates, and nitroarenes using a combination of [18F]KF·K2.2.2 and Me4NHCO3 for the in situ formation of a strongly nucleophilic fluorinating reagent (proposed to be [18F]Me4NF). This method is applied to 24 substrates bearing diverse functional groups, and it generates [18F](hetero)aryl fluoride products in good to excellent radiochemical yields in the presence of ambient air/moisture. The reaction is applied to the preparation of 18F-labeled HQ-415 for potential (pre)clinical use.
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Affiliation(s)
- So Jeong Lee
- Department of Radiology, University of Michigan, Ann Arbor, Michigan 48109, United States.,Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114,United States
| | - María T Morales-Colón
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Allen F Brooks
- Department of Radiology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jay S Wright
- Department of Radiology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Katarina J Makaravage
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Peter J H Scott
- Department of Radiology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Melanie S Sanford
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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7
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Mori W, Yamasaki T, Hattori Y, Zhang Y, Kumata K, Fujinaga M, Hanyu M, Nengaki N, Zhang H, Zhang MR. Radiosynthesis and evaluation of 4-(6-[ 18F]Fluoro-4-(5-isopropoxy-1 H-indazol-3-yl)pyridin-2-yl)morpholine as a novel radiotracer candidate targeting leucine-rich repeat kinase 2. RSC Med Chem 2020; 11:676-684. [PMID: 33479667 DOI: 10.1039/c9md00590k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 05/04/2020] [Indexed: 12/28/2022] Open
Abstract
Mutations that increase leucine-rich repeat kinase 2 (LRRK2) activity in the brain are associated with Parkinson's disease. Here, we synthesized a novel compound 4-(6-fluoro-4-(5-isopropoxy-1H-indazol-3-yl)pyridin-2-yl)morpholine (FIPM) and labeled it with fluorine-18 (18F), to develop a positron emission tomography (PET) tracer for in vivo visualization of LRRK2 in the brain. FIPM showed high in vitro binding affinity for LRRK2 (IC50 = 8.0 nM). [18F]FIPM was prepared in 5% radiochemical yield (n = 5), by inserting 18F into a pyridine ring, followed by removal of the protecting group. After HPLC separation and formulation, [18F]FIPM was acquired with >97% radiochemical purity and 103-300 GBq μmol-1 of molar activity at the end of radiosynthesis. Biodistribution and small-animal PET studies in mice indicated a low in vivo specific binding of [18F]FIPM. While [18F]FIPM presented limited potential as an in vivo PET tracer for LRRK2, we suggested that it can be used as a lead compound for developing new radiotracers with improved in vivo brain properties.
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Affiliation(s)
- Wakana Mori
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
| | - Tomoteru Yamasaki
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
| | - Yasushi Hattori
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
| | - Yiding Zhang
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
| | - Katsushi Kumata
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
| | - Masayuki Fujinaga
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
| | - Masayuki Hanyu
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
| | - Nobuki Nengaki
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan . .,SHI Accelerator Service Co. Ltd , 5-9-11, Kitashinagawa, Shinagawa-ku , Tokyo 141-8686 , Japan
| | - Hong Zhang
- Department of Nuclear Medicine and Medical PET Center , The Second Hospital of Zhejiang University School of Medicine , 88 Jiefang Rd , Hangzhou , Hangzhou 310009 , China .
| | - Ming-Rong Zhang
- Department of Advanced Nuclear Medicine Sciences , National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Anagawa 4-9-1, Inage-ku , Chiba , 263-8555 , Japan .
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8
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Bugaenko DI, Karchava AV, Yurovskaya MA. The versatility of DABCO: synthetic applications of its basic, nucleophilic, and catalytic properties. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02655-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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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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10
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Chiotellis A, Ahmed H, Betzel T, Tanriver M, White CJ, Song H, Da Ros S, Schibli R, Bode JW, Ametamey SM. Chemoselective 18F-incorporation into pyridyl acyltrifluoroborates for rapid radiolabelling of peptides and proteins at room temperature. Chem Commun (Camb) 2020; 56:723-726. [PMID: 31840690 DOI: 10.1039/c9cc08645e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new prosthetic group is reported for quantitative 18F-labelling of peptides and proteins based on the chemoselective ligation of potassium acyltrifluoroborates (KATs) and hydroxylamines without any detectable 18F/19F isotope exchange at the KAT moiety.
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Affiliation(s)
- Aristeidis Chiotellis
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ
- Institute of Pharmaceutical Sciences ETH
- 8093 Zurich
- Switzerland
| | - Hazem Ahmed
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ
- Institute of Pharmaceutical Sciences ETH
- 8093 Zurich
- Switzerland
| | - Thomas Betzel
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ
- Institute of Pharmaceutical Sciences ETH
- 8093 Zurich
- Switzerland
| | - Matthias Tanriver
- Laboratory of Organic Chemistry
- Department of Chemistry and Applied Biosciences
- 8093 Zurich
- Switzerland
| | - Christopher J. White
- Laboratory of Organic Chemistry
- Department of Chemistry and Applied Biosciences
- 8093 Zurich
- Switzerland
| | - Haewon Song
- Laboratory of Organic Chemistry
- Department of Chemistry and Applied Biosciences
- 8093 Zurich
- Switzerland
| | - Sara Da Ros
- Laboratory of Organic Chemistry
- Department of Chemistry and Applied Biosciences
- 8093 Zurich
- Switzerland
| | - Roger Schibli
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ
- Institute of Pharmaceutical Sciences ETH
- 8093 Zurich
- Switzerland
| | - Jeffrey W. Bode
- Laboratory of Organic Chemistry
- Department of Chemistry and Applied Biosciences
- 8093 Zurich
- Switzerland
| | - Simon M. Ametamey
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ
- Institute of Pharmaceutical Sciences ETH
- 8093 Zurich
- Switzerland
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11
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Matthias J, Kanagasundaram T, Kopka K, Kramer CS. Synthesis of a dihalogenated pyridinyl silicon rhodamine for mitochondrial imaging by a halogen dance rearrangement. Beilstein J Org Chem 2019; 15:2333-2343. [PMID: 31666868 PMCID: PMC6808212 DOI: 10.3762/bjoc.15.226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/05/2019] [Indexed: 12/30/2022] Open
Abstract
Background: Since their first synthesis, silicon xanthenes and the subsequently developed silicon rhodamines (SiR) gained a lot of attention as attractive fluorescence dyes offering a broad field of application. We aimed for the synthesis of a fluorinable pyridinyl silicon rhodamine for the use in multimodal (PET/OI) medical imaging of mitochondria in cancerous cells. Results: A dihalogenated fluorinatable pyridinyl rhodamine could be successfully synthesized with the high yield of 85% by application of a halogen dance (HD) rearrangement. The near-infrared dye shows a quantum yield of 0.34, comparable to other organelle targeting SiR derivatives and absorbs at 665 nm (εmax = 34 000 M−1cm−1) and emits at 681 nm (τ = 1.9 ns). Using colocalization experiments with MitoTracker® Green FM, we could prove the intrinsic targeting ability to mitochondria in two human cell lines (Pearson coefficient >0.8). The dye is suitable for live cell STED nanoscopy imaging and shows a nontoxic profile which makes it an appropriate candidate for medical imaging. Conclusions: We present a biocompatible, nontoxic, small molecule near-infrared dye with the option of subsequent radiolabelling and excellent optical properties for medical and bioimaging. As a compound with intrinsic mitochondria targeting ability, the radiolabelled analogue can be applied in multimodal (PET/OI) imaging of mitochondria for diagnostic and therapeutic use in, e.g., cancer patients.
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Affiliation(s)
- Jessica Matthias
- Max Planck Institute for Medical Research, Department of Optical Nanoscopy, Jahnstraße 29, 69120 Heidelberg, Germany.,Helmholtz International Graduate School, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 223, 69120 Heidelberg, Germany
| | - Thines Kanagasundaram
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 223, 69120 Heidelberg, Germany.,Institute of Inorganic Chemistry, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Klaus Kopka
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 223, 69120 Heidelberg, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany
| | - Carsten S Kramer
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 223, 69120 Heidelberg, Germany
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12
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de Toledo I, Grigolo TA, Bennett JM, Elkins JM, Pilli RA. Modular Synthesis of Di- and Trisubstituted Imidazoles from Ketones and Aldehydes: A Route to Kinase Inhibitors. J Org Chem 2019; 84:14187-14201. [PMID: 31460764 PMCID: PMC6829625 DOI: 10.1021/acs.joc.9b01844] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
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A one-pot and modular approach to
the synthesis of 2,4(5)-disubstituted
imidazoles was developed based on ketone oxidation, employing catalytic
HBr and DMSO, followed by imidazole condensation with aldehydes. This
methodology afforded twenty-nine disubstituted NH-imidazoles (23%–85% yield). A three-step synthesis of 20
kinase inhibitors was achieved by employing this oxidation–condensation
protocol, followed by bromination and Suzuki coupling in the imidazole
ring to yield trisubstituted NH-imidazoles (23%–69%,
three steps). This approach was also employed in the synthesis of
known inhibitor GSK3037619A.
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Affiliation(s)
- Ian de Toledo
- Department of Organic Chemistry, Institute of Chemistry , University of Campinas, UNICAMP , Campinas , São Paulo 13083-970 , Brazil
| | - Thiago A Grigolo
- Department of Organic Chemistry, Institute of Chemistry , University of Campinas, UNICAMP , Campinas , São Paulo 13083-970 , Brazil
| | - James M Bennett
- Structural Genomics Consortium, Nuffield Department of Medicine , University of Oxford , Old Road Campus Research Building, Roosevelt Drive , Oxford OX3 7DQ , United Kingdom
| | - Jonathan M Elkins
- Structural Genomics Consortium, Nuffield Department of Medicine , University of Oxford , Old Road Campus Research Building, Roosevelt Drive , Oxford OX3 7DQ , United Kingdom.,Structural Genomics Consortium, Departamento de Genética e Evolução , Instituto de Biologia, UNICAMP , Campinas , São Paulo 13083-886 , Brazil
| | - Ronaldo A Pilli
- Department of Organic Chemistry, Institute of Chemistry , University of Campinas, UNICAMP , Campinas , São Paulo 13083-970 , Brazil
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13
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Pauton M, Aubert C, Bluet G, Gruss-Leleu F, Roy S, Perrio C. Development, Optimization, and Scope of the Radiosynthesis of 3/5-[18F]Fluoropyridines from Readily Prepared Aryl(pyridinyl) Iodonium Salts: The Importance of TEMPO and K2CO3. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Mathilde Pauton
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT UMR 6030, LDM-TEP, Cyceron, Boulevard Henri Becquerel, 14000 Caen, France
- Sanofi R&D, 13 Quai Jules Guesde, 94403 Vitry sur Seine Cedex, France
| | - Catherine Aubert
- Sanofi R&D, 13 Quai Jules Guesde, 94403 Vitry sur Seine Cedex, France
| | - Guillaume Bluet
- Sanofi R&D, 13 Quai Jules Guesde, 94403 Vitry sur Seine Cedex, France
| | | | - Sébastien Roy
- Sanofi R&D, 13 Quai Jules Guesde, 94403 Vitry sur Seine Cedex, France
| | - Cécile Perrio
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT UMR 6030, LDM-TEP, Cyceron, Boulevard Henri Becquerel, 14000 Caen, France
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