Methods
IMPs were prepared from alkylamines and anilines. Intermolecular ligation with various nucleophiles was mediated by CO2.[3] Radiolabelling optimization was performed by reacting phenyltriphenylphosphinimine, no-carrier-added [11C]CO2 and benzylamine. Utility of this method was assessed by synthesis and isolation of several 11C-labeled carbonyl derivatives including [11C]CURB, a fatty acid amide hydrolase radioligand.