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Radiosynthesis of O-(1-[18 F]fluoropropan-2-yl)-O-(4-nitrophenyl)methylphosphonate: a novel PET tracer surrogate of sarin.

A new interesting article has been published in J Labelled Comp Radiopharm. 2018 Oct 22. doi: 10.1002/jlcr.3688. [Epub ahead of print] and titled:

Radiosynthesis of O-(1-[18 F]fluoropropan-2-yl)-O-(4-nitrophenyl)methylphosphonate: a novel PET tracer surrogate of sarin.

Authors of this article are:

Hayes TR, Thompson CM, Blecha JE, Gerdes JM, VanBrocklin HF.

A summary of the article is shown below:

O-(1-Fluoropropan-2-yl)-O-(4-nitrophenyl) methylphosphonate is a reactive organophosphate ester (OP) developed as a surrogate of the chemical warfare agent sarin that forms a similar covalent adduct at the active site serine of acetylcholinesterase. The radiolabeled O-(1-[18 F]fluoropropan-2-yl)-O-(4-nitrophenyl) methylphosphonate ([18 F] fluorosarin surrogate) has not been previously prepared. In this paper, we report the first radiosynthesis of this tracer from the reaction of bis-(4-nitrophenyl) methylphosphonate with 1-[18 F]fluoro-2-propanol in the presence of DBU. The 1-[18 F]fluoro-2-propanol was prepared by reaction of propylene sulfite with Kryptofix 2.2.2 and [18 F] fluoride ion. The desired tracer O-(1-[18 F]fluoropropan-2-yl)-O-(4-nitrophenyl) methylphosphonate was obtained in a > 98% radiochemical purity with a 2.4% ± 0.6% yield (n=5, 65 min from start of synthesis) based on starting [18 F] fluoride ion and a molar activity of 49.9 GBq/μmol (1.349 ± 0.329 Ci/μmol, n = 3). This new facile radiosynthesis routinely affords sufficient quantities of [18 F] fluorosarin surrogate in high radiochemical purity, which will further enable the tracer development as a novel radiolabeled OP acetylcholinesterase inhibitor for assessment of OP modes of action with PET imaging in vivo.

Check out the article’s website on Pubmed for more information:



This article is a good source of information and a good way to become familiar with topics such as:

[18F] fluorosarin surrogate;acetylcholinesterase;fluorine-18;positron emission tomography (PET)

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