Tos-Nos-Mos: Synthesis of different aryl sulfonate precursors for the radiosynthesis of the alpha7 nicotinic acetylcholine receptor radioligand [18F]NS14490

The use of these different precursors resulted in comparable labelling yields of [18F]NS14490. A novel mosylate precursor was synthesized and evaluated, which has revealed a higher stability during a storage period of five months compared to the corresponding tosylate and nosylate.