Synthesis of 1-[2-[18F]fluoro-1-(hydroxymethyl)-ethoxy]methyl-2-nitroimidazole ([18F]FENI), a potential agent for imaging hypoxic tissues by PET
摘要:
Fluorine-18 labeled 1-[2-fluoro-1-(hydroxymethyl) ethoxy]-mehyl-2-nitroimidazole ([F-18]FENI), a novel, potential radiotracer for imaging hypoxic tissue by PET, was synthesized. The [F-18]FENI was prepared by nucleophilic F-18-fluorination of the precursor, 1-[2-(toluene-4-sulfoxy)-1-(acetoxymethyl)ethoxy]methyl-2-nitroimidazole, followed by deprotection and HPLC purification. Radiochemically pure [F-18]FENI was obtained in overall yields of 3-11% (EOR) with specific activity of >26 GBq/mu mol (EOS) within 90 min.