Synthesis and <i>in vitro</i> evaluation of fluorine-18 benzimidazole sulfones as CB2 PET-radioligands
作者:Annukka Kallinen、Rochelle Boyd、Samuel Lane、Rajiv Bhalla、Karine Mardon、Damion H. R. Stimson、Eryn L. Werry、Roger Fulton、Mark Connor、Michael Kassiou
DOI:10.1039/c9ob00656g
日期:——
selectivity over the CB1 subtype (>10 000×). Selected ligands 1d, 1e, 1g and 3l showing high CB2 binding affinity (Ki < 10 nM) were radiolabelled with fluorine-18 from chloropyridyl and alkyl tosylate precursors with good to high isolated radioactive yields (25–44%, non-decay corrected, at the end of synthesis). CB2-specific binding of the radioligand candidates [18F]-1d and [18F]-3l was assessed on rat spleen