One-step synthesis of N-succinimidyl-4-[18F]Fluorobenzoate ([18F]SFB)

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Herein, we present a one-step labeling procedure of N-succinimidyl-4-[18F]-fluorobenzoate ([18F]SFB) starting from spirocyclic iodonium ylide precursors. Precursor syntheses succeeded via a simple one-pot, two-step synthesis sequence, in yields of approximately 25%. Subsequent 18F-nucleophilic aromatic labeling was performed, and radiochemical incorporations (RCCs) from 5-35% were observed. Purification could be carried out using HPLC and subsequent solid phase extraction. Radiochemical purity (RCP) of >95% was determined. The total synthesis time, including purification and formulation, was no longer than 60 min. In comparison to the established 3-step synthesis route of [18F]SFB, this one-step approach avoids formation of volatile radioactive side-products and simplifies automatization.

Original languageEnglish
Article number3436
Issue number19
Number of pages7
Publication statusPublished - 22 Sep 2019

    Research areas

  • Fluorine-18, Iodonium ylides, N-succinimidyl-4-[F]fluorobenzoate, PET, [F]SFB

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