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Title: Development of Customized [18F]Fluoride Elution Techniques for the Enhancement of Copper-Mediated Late-Stage Radiofluorination

Journal Article · · Scientific Reports
ORCiD logo [1];  [1];  [2];  [2];  [2];  [3]
  1. Univ. of Michigan Medical School, Ann Arbor, MI (United States). Dept. of Radiology
  2. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Chemistry
  3. Univ. of Michigan Medical School, Ann Arbor, MI (United States). Dept. of Radiology and Interdepartmental Program in Medicinal Chemistry

In a relatively short period of time, transition metal-mediated radiofluorination reactions have changed the PET radiochemistry landscape. These reactions have enabled the radiofluorination of a wide range of substrates, facilitating access to radiopharmaceuticals that were challenging to synthesize using traditional fluorine-18 radiochemistry. However, the process of adapting these new reactions for automated radiopharmaceutical production has revealed limitations in fitting them into the confines of traditional radiochemistry systems. In particular, the presence of bases (e.g. K2CO3) and/or phase transfer catalysts (PTC) (e.g. kryptofix 2.2.2) associated with fluorine-18 preparation has been found to be detrimental to reaction yields. We hypothesized that these limitations could be addressed through the development of alternate techniques for preparing [18F]fluoride. This approach also opens the possibility that an eluent can be individually tailored to meet the specific needs of a metal-catalyzed reaction of interest. In this communication, we demonstrate that various solutions of copper salts, bases, and ancillary ligands can be utilized to elute [18F]fluoride from ion exchange cartridges. The new procedures we present here are effective for fluorine-18 radiochemistry and, as proof of concept, have been used to optimize an otherwise base-sensitive copper-mediated radiofluorination reaction.

Research Organization:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE; National Institutes of Health (NIH); Merck and Company, Inc., Kenilworth, NJ (United States)
Grant/Contract Number:
SC0012484; R01EB021155
OSTI ID:
1425386
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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Cited By (13)

Copper-Mediated Radiofluorination of Aryl Pinacolboronate Esters: A Straightforward Protocol by Using Pyridinium Sulfonates: Copper-Mediated Radiofluorination of Aryl Pinacolboronate Esters: A Straightforward Protocol by Using Pyridinium Sulfonates journal December 2018
Automated synthesis of PET radiotracers by copper-mediated 18 F-fluorination of organoborons: Importance of the order of addition and competing protodeborylation
  • Mossine, Andrew V.; Brooks, Allen F.; Bernard-Gauthier, Vadim
  • Journal of Labelled Compounds and Radiopharmaceuticals, Vol. 61, Issue 3 https://doi.org/10.1002/jlcr.3583
journal February 2018
An azeotropic drying-free approach for copper-mediated radiofluorination without addition of base journal February 2019
A Design of Experiments (DoE) Approach Accelerates the Optimization of Copper-Mediated 18F-Fluorination Reactions of Arylstannanes journal August 2019
Boron reagents for divergent radiochemistry journal January 2018
Stereospecific radiosynthesis of 3-fluoro amino acids: access to enantiomerically pure radioligands for positron emission tomography journal January 2018
C–H 18 F-fluorination of 8-methylquinolines with Ag[ 18 F]F journal January 2019
Ring opening of epoxides with [ 18 F]FeF species to produce [ 18 F]fluorohydrin PET imaging agents journal January 2019
One-pot synthesis of high molar activity 6-[ 18 F]fluoro- l -DOPA by Cu-mediated fluorination of a BPin precursor journal January 2019
Fast and efficient copper-mediated 18F-fluorination of arylstannanes, aryl boronic acids, and aryl boronic esters without azeotropic drying journal October 2019
A Practical Method for the Preparation of 18F-Labeled Aromatic Amino Acids from Nucleophilic [18F]Fluoride and Stannyl Precursors for Electrophilic Radiohalogenation journal December 2017
Alcohol-Supported Cu-Mediated 18F-Fluorination of Iodonium Salts under “Minimalist” Conditions journal September 2019
Late-Stage Copper-Catalyzed Radiofluorination of an Arylboronic Ester Derivative of Atorvastatin journal November 2019