[carboxyl-(14) C]Celivarone was synthesised from barium [(14) C]carbonate with overall radiochemical yields in the range 49-53%. The synthetic route involves [(14) C]carbonylation methodology, which both decreased the number of synthetic steps and increased the yields obtained from previous synthetic routes.
Keywords: [14C]carbonylation; [carboxyl-14C]celivarone; antiarrhythmic; lithium [14C]formate.
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