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  • Title: Radiosynthesis of novel N-18 F-labeled 18 F-FHex-α-l-Glu and 18 F-FHex-β-Glu.
    Author: Wen F, Liu S, Ma H, Tang G.
    Journal: J Labelled Comp Radiopharm; 2020 May 15; 63(5):222-230. PubMed ID: 32227528.
    Abstract:
    N-18 F-labeled amino acids are important substitutes for new positron emission tomography (PET) imaging tracers complementing the deficiency of 18 F-fluorodeoxyglucose (18 F-FDG). In this work, two novel N-6-18 F-alkyl amino acid imaging agents, 18 F-FHex-α-l-Glu and 18 F-FHex-β-Glu, were designed and synthesized as potential probes for PET imaging of tumors. 18 F-FHex-α-l-Glu was synthesized using the precursor 6 from 18 F-F- with the yield of 16 ± 4% (n = 5, uncorrected) within about 50 minutes. The specific activity was 14.5 GBq/μmol, and the radiochemical purity was more than 95%. 18 F-FHex-β-Glu was synthesized using the precursor 12 based on 18 F-F- with the yield of 11 ± 3% (n = 3, uncorrected) in about 60 minutes. The specific activity was 9.1 GBq/μmol, and the radiochemical purity was more than 95%.
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