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  • Title: Automation of the radiosynthesis and purification procedures for [18F]Fluspidine preparation, a new radiotracer for clinical investigations in PET imaging of σ(1) receptors in brain.
    Author: Maisonial-Besset A, Funke U, Wenzel B, Fischer S, Holl K, Wünsch B, Steinbach J, Brust P.
    Journal: Appl Radiat Isot; 2014 Feb; 84():1-7. PubMed ID: 24291352.
    Abstract:
    The radiosynthesis of [(18)F]Fluspidine, a potent σ1 receptor imaging probe for pre-clinical/clinical studies, was implemented on a TRACERlab(TM) FX F-N synthesizer. [(18)F]2 was synthesized in 15 min at 85 °C starting from its tosylate precursor. Purification via semi-preparative RP-HPLC was investigated using different columns and eluent compositions and was most successful on a polar RP phase with acetonitrile/water buffered with NH4OAc. After solid phase extraction, [(18)F]Fluspidine was formulated and produced within 59±4 min with an overall radiochemical yield of 37±8%, a radiochemical purity of 99.3±0.5% and high specific activity (176.6±52.0 GBq/µmol).
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