1
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Rao WH, Li YG, Jiang LL, Li Q, Zou GD, Cao X. Metal-Free Selective Ortho-C-H Amidation of Hypervalent(III) Iodobezenes with N-Methoxy Amides under Mild Conditions. J Org Chem 2023; 88:13825-13837. [PMID: 37737590 DOI: 10.1021/acs.joc.3c01472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
A metal-free selective ortho-C-H amidation of aryl iodines(III) with the use of N-methoxy amides as aminating reagents under mild conditions is described here. In the protocol, excellent chemoselectivity and high regioselectivity were obtained. Notably, the iodine substituent rendered the amidation product suitable to be used for further elaboration.
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Affiliation(s)
- Wei-Hao Rao
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, China
| | - Ying-Ge Li
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Li-Li Jiang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Qi Li
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Guo-Dong Zou
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Xinhua Cao
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
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2
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Abstract
18F-fluorination is an important and growing field in organic synthesis that has attracted many chemists in the recent past. Here we present our own, biased perspective with a focus on our own chemistry that evaluates recent advances in the field and provides our opinion on the challenges for the development of new chemistry, so that it may have an impact on imaging. We hope that the manuscript will provide a useful guide to chemists to develop reliable and robust reaction chemistry suitable for radiofluorination to have a real impact on human health.
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Affiliation(s)
- Riya Halder
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Tobias Ritter
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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3
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Hall AJ, Haskali MB. Radiolabelled Peptides: Optimal Candidates for Theranostic Application in Oncology. Aust J Chem 2021. [DOI: 10.1071/ch21118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Zhu Y, Chen L, Hou W, Li Y. Recent Progress in Nucleophilic Fluoride Mediated Fluorine-18 Labeling of Arenes and Heteroarenes. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202010030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Yang Y, Gao X, Zeng X, Han J, Xu B. Hydrogen-Bond-Donor Solvents Enable Catalyst-Free (Radio)-Halogenation and Deuteration of Organoborons. Chemistry 2020; 27:1297-1300. [PMID: 32966636 DOI: 10.1002/chem.202003919] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/17/2020] [Indexed: 12/25/2022]
Abstract
A hydrogen bond donor solvent assisted (radio)halogenation and deuteration of organoborons has been developed. The reactions exhibited high functional group tolerance and needed only an ambient atmosphere. Most importantly, compared to literature methods, our conditions are more consistent with the principals of green chemistry (e.g., metal-free, strong oxidant-free, more straightforward conditions).
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Affiliation(s)
- Yi Yang
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
| | - Xinyan Gao
- Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai, P. R. China
| | - Xiaojun Zeng
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
| | - Junbin Han
- Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai, P. R. China
| | - Bo Xu
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
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6
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Abudken AMH, Hope EG, Singh K, Stuart AM. Fluorinations of unsymmetrical diaryliodonium salts containing ortho-sidearms; influence of sidearm on selectivity. Org Biomol Chem 2020; 18:6140-6146. [PMID: 32724955 DOI: 10.1039/d0ob01401j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Activated aromatics were reacted with two different fluoroidoane reagents 1 and 2 in the presence of triflic acid to prepare only the para-substituted diaryliodonium salts. With fluoroiodane 1 the unsymmetrical diaryliodonium salts contained an ortho-propan-2-ol sidearm, whereas the alcohol sidearm was eliminated to form an ortho-styrene sidearm in the reaction with fluoroiodane 2. Only the diaryliodonium salts containing a styrene sidearm were fluorinated successfully to deliver para-fluorinated aromatics in good yields.
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Affiliation(s)
- Ahmed M H Abudken
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, UK. and College of Pharmacy, Al-Qadisiyah University, Al-Qadisiyah, Iraq
| | - Eric G Hope
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, UK.
| | - Kuldip Singh
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, UK.
| | - Alison M Stuart
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, UK.
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7
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Facile 18F labeling of non-activated arenes via a spirocyclic iodonium(III) ylide method and its application in the synthesis of the mGluR 5 PET radiopharmaceutical [ 18F]FPEB. Nat Protoc 2019; 14:1530-1545. [PMID: 30980032 DOI: 10.1038/s41596-019-0149-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 02/12/2019] [Indexed: 01/08/2023]
Abstract
Non-activated (electron-rich and/or sterically hindered) arenes are prevalent chemical scaffolds in pharmaceuticals and positron emission tomography (PET) diagnostics. Despite substantial efforts to develop a general method to introduce 18F into these moieties for molecular imaging by PET, there is an urgent and unmet need for novel radiofluorination strategies that result in sufficiently labeled tracers to enable human imaging. Herein, we describe an efficient method that relies on spirocyclic iodonium ylide (SCIDY) precursors for one-step and regioselective radiofluorination, as well as proof-of-concept translation to the radiosynthesis of a clinically useful PET tracer, 3-[18F]fluoro-5-[(pyridin-3-yl)ethynyl] benzonitrile ([18F]FPEB). The protocol begins with the preparation of a SCIDY precursor for FPEB, followed by radiosynthesis of [18F]FPEB, by either manual operation or an automated synthesis module. [18F]FPEB can be obtained in quantities >7.4 GBq (200 mCi), ready for injection (20 ± 5%, non-decay corrected), and has excellent chemical and radiochemical purity (>98%) as well as high molar activity (666 ± 51.8 GBq/μmol; 18 ± 1.4 Ci/μmol). The total time for the synthesis and purification of the corresponding labeling SCIDY precursor is 10 h. The subsequent radionuclide production, experimental setup, 18F labeling, and formulation of a product that is ready for injection require 2 h.
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8
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Deng X, Rong J, Wang L, Vasdev N, Zhang L, Josephson L, Liang SH. Chemistry for Positron Emission Tomography: Recent Advances in 11 C-, 18 F-, 13 N-, and 15 O-Labeling Reactions. Angew Chem Int Ed Engl 2019; 58:2580-2605. [PMID: 30054961 PMCID: PMC6405341 DOI: 10.1002/anie.201805501] [Citation(s) in RCA: 207] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Indexed: 01/07/2023]
Abstract
Positron emission tomography (PET) is a molecular imaging technology that provides quantitative information about function and metabolism in biological processes in vivo for disease diagnosis and therapy assessment. The broad application and rapid advances of PET has led to an increased demand for new radiochemical methods to synthesize highly specific molecules bearing positron-emitting radionuclides. This Review provides an overview of commonly used labeling reactions through examples of clinically relevant PET tracers and highlights the most recent developments and breakthroughs over the past decade, with a focus on 11 C, 18 F, 13 N, and 15 O.
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Affiliation(s)
- Xiaoyun Deng
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Department of Radiology, Harvard Medical School, Boston, MA, 02114, USA
| | - Jian Rong
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Department of Radiology, Harvard Medical School, Boston, MA, 02114, USA
| | - Lu Wang
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Department of Radiology, Harvard Medical School, Boston, MA, 02114, USA
| | - Neil Vasdev
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Department of Radiology, Harvard Medical School, Boston, MA, 02114, USA
| | - Lei Zhang
- Medicine Design, Pfizer Inc., Cambridge, MA, 02139, USA
| | - Lee Josephson
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Department of Radiology, Harvard Medical School, Boston, MA, 02114, USA
| | - Steven H Liang
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital & Department of Radiology, Harvard Medical School, Boston, MA, 02114, USA
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9
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Deng X, Rong J, Wang L, Vasdev N, Zhang L, Josephson L, Liang SH. Chemie der Positronenemissionstomographie: Aktuelle Fortschritte bei
11
C‐,
18
F‐,
13
N‐ und
15
O‐Markierungsreaktionen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201805501] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xiaoyun Deng
- Division of Nuclear Medicine and Molecular ImagingMassachusetts General Hospital & Department of RadiologyHarvard Medical School Boston MA 02114 USA
| | - Jian Rong
- Division of Nuclear Medicine and Molecular ImagingMassachusetts General Hospital & Department of RadiologyHarvard Medical School Boston MA 02114 USA
| | - Lu Wang
- Division of Nuclear Medicine and Molecular ImagingMassachusetts General Hospital & Department of RadiologyHarvard Medical School Boston MA 02114 USA
| | - Neil Vasdev
- Division of Nuclear Medicine and Molecular ImagingMassachusetts General Hospital & Department of RadiologyHarvard Medical School Boston MA 02114 USA
| | - Lei Zhang
- Medicine DesignPfizer Inc. Cambridge MA 02139 USA
| | - Lee Josephson
- Division of Nuclear Medicine and Molecular ImagingMassachusetts General Hospital & Department of RadiologyHarvard Medical School Boston MA 02114 USA
| | - Steven H. Liang
- Division of Nuclear Medicine and Molecular ImagingMassachusetts General Hospital & Department of RadiologyHarvard Medical School Boston MA 02114 USA
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10
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Kwon YD, Son J, Chun JH. Catalyst-Free Aromatic Radiofluorination via Oxidized Iodoarene Precursors. Org Lett 2018; 20:7902-7906. [PMID: 30521348 DOI: 10.1021/acs.orglett.8b03450] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Oxidized iodoarenes (OIAs), prepared via mCPBA-mediated oxidation, have been demonstrated as versatile precursors for the synthesis of [18F]fluoroarenes in the absence of catalysts. OIAs have been identified as intermediates in single-pot syntheses of iodonium salts and ylides but have never been recognized as radiofluorination precursors. Here, the isolated OIAs were used without any catalysts to produce functionalized [18F]fluoroarenes, regardless of the electronic nature of the arenes. This method was also applied to the production of radiolabeling synthons for use as aromatic 18F-labeled building blocks.
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Affiliation(s)
- Young-Do Kwon
- Department of Nuclear Medicine , Yonsei University College of Medicine , Seoul 03722 , Republic of Korea
| | - Jeongmin Son
- Department of Nuclear Medicine, Severance Hospital , Yonsei University Health System , Seoul 03722 , Republic of Korea
| | - Joong-Hyun Chun
- Department of Nuclear Medicine , Yonsei University College of Medicine , Seoul 03722 , Republic of Korea
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11
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Nanjo T, Kato N, Takemoto Y. Oxidative Decarboxylation Enables Chemoselective, Racemization-Free Esterification: Coupling of α-Ketoacids and Alcohols Mediated by Hypervalent Iodine(III). Org Lett 2018; 20:5766-5769. [PMID: 30168722 DOI: 10.1021/acs.orglett.8b02466] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An α-ketoacid could be converted into a reactive acylating agent by treatment with hypervalent iodine(III) species, and in so doing, we discovered a novel decarboxylative acylation of alcohols that affords a variety of esters in excellent yields. The esterification has been applied to a sterol bearing a free carboxylic acid and shows unique chemoselectivity. The procedure is racemization-free and operates under mild conditions.
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Affiliation(s)
- Takeshi Nanjo
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Natsuki Kato
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
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12
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Zeng X, Li J, Ng CK, Hammond GB, Xu B. (Radio)fluoroclick Reaction Enabled by a Hydrogen-Bonding Cluster. Angew Chem Int Ed Engl 2018; 57:2924-2928. [PMID: 29276938 PMCID: PMC6233894 DOI: 10.1002/anie.201711341] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Indexed: 12/21/2022]
Abstract
We have developed a widely applicable nucleophilic (radio)fluoroclick reaction of ynamides with readily available and easy-to-handle KF(18 F). The reactions exhibited high functional-group tolerance and needed only an ambient atmosphere. This 18 F addition to C-C unsaturated bonds proceeded with extraordinarily high radiochemical yields.
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Affiliation(s)
- Xiaojun Zeng
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, China
| | - Junling Li
- Department of Diagnostic Radiology, University of Louisville, Louisville, KY 40292 USA
| | - Chin K. Ng
- Department of Diagnostic Radiology, University of Louisville, Louisville, KY 40292 USA
| | - Gerald B. Hammond
- Department of Chemistry, University of Louisville, Louisville, KY 40292 USA.,
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, China
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13
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Zeng X, Li J, Ng CK, Hammond GB, Xu B. (Radio)fluoroclick Reaction Enabled by a Hydrogen-Bonding Cluster. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711341] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiaojun Zeng
- College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; Shanghai 201620 China
| | - Junling Li
- Department of Diagnostic Radiology; University of Louisville; Louisville KY 40292 USA
| | - Chin K. Ng
- Department of Diagnostic Radiology; University of Louisville; Louisville KY 40292 USA
| | - Gerald B. Hammond
- Department of Chemistry; University of Louisville; Louisville KY 40292 USA
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; Shanghai 201620 China
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14
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Pike VW. Hypervalent aryliodine compounds as precursors for radiofluorination. J Labelled Comp Radiopharm 2018; 61:196-227. [PMID: 28981159 PMCID: PMC10081107 DOI: 10.1002/jlcr.3570] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 09/27/2017] [Indexed: 12/12/2022]
Abstract
Over the last 2 decades or so, hypervalent iodine compounds, such as diaryliodonium salts and aryliodonium ylides, have emerged as useful precursors for labeling homoarenes and heteroarenes with no-carrier-added cyclotron-produced [18 F]fluoride ion (t1/2 = 109.8 min). They permit rapid and effective radiofluorination at electron-rich as well as electron-deficient aryl rings, and often with unrestricted choice of ring position. Consequently, hypervalent aryliodine compounds have found special utility as precursors to various small-molecule 18 F-labeling synthons and to many radiotracers for biomedical imaging with positron emission tomography. This review summarizes this advance in radiofluorination chemistry, with emphasis on precursor synthesis, radiofluorination mechanism, method scope, and method application.
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Affiliation(s)
- Victor W Pike
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
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15
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McCammant M, Thompson S, Brooks AF, Krska SW, Scott PJH, Sanford MS. Cu-Mediated C-H 18F-Fluorination of Electron-Rich (Hetero)arenes. Org Lett 2017; 19:3939-3942. [PMID: 28665619 PMCID: PMC5525103 DOI: 10.1021/acs.orglett.7b01902] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Indexed: 12/05/2022]
Abstract
This communication describes a method for the nucleophilic radiofluorination of electron-rich arenes. The reaction involves the initial C(sp2)-H functionalization of an electron-rich arene with MesI(OH)OTs to form a (mesityl)(aryl)iodonium salt. This salt is then used in situ in a Cu-mediated radiofluorination with [18F]KF. This approach leverages the stability and availability of electron-rich arene starting materials to enable mild late-stage radiofluorination of toluene, anisole, aniline, pyrrole, and thiophene derivatives. The radiofluorination has been automated to access a 41 mCi dose of an 18F-labeled nimesulide derivative in high (2800 ± 700 Ci/mmol) specific activity.
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Affiliation(s)
- Matthew
S. McCammant
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Stephen Thompson
- Department
of Radiology, University of Michigan, 1301 Catherine, Ann Arbor, Michigan 48109, United States
| | - Allen F. Brooks
- Department
of Radiology, University of Michigan, 1301 Catherine, Ann Arbor, Michigan 48109, United States
| | - Shane W. Krska
- Chemistry
Capabilities and Screening, Merck Sharp & Dohme, Kenilworth, New Jersey 07033, United States
| | - Peter J. H. Scott
- Department
of Radiology, University of Michigan, 1301 Catherine, Ann Arbor, Michigan 48109, United States
| | - Melanie S. Sanford
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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16
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van der Born D, Pees A, Poot AJ, Orru RVA, Windhorst AD, Vugts DJ. Fluorine-18 labelled building blocks for PET tracer synthesis. Chem Soc Rev 2017; 46:4709-4773. [DOI: 10.1039/c6cs00492j] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review presents a comprehensive overview of the synthesis and application of fluorine-18 labelled building blocks since 2010.
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Affiliation(s)
- Dion van der Born
- Department of Radiology & Nuclear Medicine
- VU University Medical Center
- 1081 HV Amsterdam
- The Netherlands
| | - Anna Pees
- Department of Radiology & Nuclear Medicine
- VU University Medical Center
- 1081 HV Amsterdam
- The Netherlands
| | - Alex J. Poot
- Department of Radiology & Nuclear Medicine
- VU University Medical Center
- 1081 HV Amsterdam
- The Netherlands
| | - Romano V. A. Orru
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules
- Medicines & Systems (AIMMS)
- VU University Amsterdam
- Amsterdam
- The Netherlands
| | - Albert D. Windhorst
- Department of Radiology & Nuclear Medicine
- VU University Medical Center
- 1081 HV Amsterdam
- The Netherlands
| | - Danielle J. Vugts
- Department of Radiology & Nuclear Medicine
- VU University Medical Center
- 1081 HV Amsterdam
- The Netherlands
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17
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Petersen IN, Kristensen JL, Herth MM. Nucleophilic 18
F-Labeling of Spirocyclic Iodonium Ylide or Boronic Pinacol Ester Precursors: Advantages and Disadvantages. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601448] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ida Nymann Petersen
- University of Copenhagen; Department of Drug Design and Pharmacology; Jagtvej 160 2100 Copenhagen Denmark
| | | | - Matthias Manfred Herth
- University of Copenhagen; Department of Drug Design and Pharmacology; Jagtvej 160 2100 Copenhagen Denmark
- Rigshospitalet; Department of Clinical Physiology, Nuclear Medicine and PET; Blegdamsvej 9 2100 Copenhagen Denmark
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