Organocatalyst-assisted Ar- 18 F bond formation: a universal procedure for direct aromatic radiofluorination

A metal free, phosphane-catalysed protocol for C-F bond formation based on ipso-elimination of iodanes is described. The reaction proceeds in significantly higher yield and with markedly reduced variability of yields (yield range) than previously described procedures. Rapid and efficient radiofluorination is achieved using unobjectionable chemical reagents with precedence in routine radiotracer production. With operational ease and mild conditions, the method promises a high potential for radiolabelling of biomolecules.