摘要Nicotinic acetylcholine receptors (nChRs) are involved in the variouspharmacological effects or disease states. In order to study the central nChRs by PETor SPECT, some radioligands have been investigated. In this paper, the procedurefor synthesis of 2-[18F]fluoro-3-[2(S)-2-azetidinylmethoxy]pyridine (2-[18F]-A-85380), apotential PET ligand for in vivo imaging nicotinic acetylcholine receptor was described.2-[18F]-A-85380 was prepared from the precursor, 2-nitro-3-[(1-(tert-butoxycarbonyl)-2-(S)-azetidinyl)methoxy]pyridine(4), which was synthesized with commercial (S)-2-azetid- inecarboxylic acid as starting material. The whole procedure for radiosynthesisand purification was executed in about lh and 45-55% of the added fluorine-18 wasfound in the purified 2-[18F]-A-85380, with specific activity of 1.0-2.2 × 1011 Bq/μmol.``