Solid-phase supported direct ¹⁸F-radiofluorination of peptides

The absence of universal and expedient labeling procedures hampers the widespread application of peptides as molecular tracers for positron emission tomography (PET). In this work, we have developed a proof-of-concept direct radiofluorination procedure for peptides using conventional solid-phase peptide synthesis. The method is compatible with all standard amino acids and enables the generation of a range of peptide-based radiopharmaceuticals archieving radiochemical yields of up to 30 % and radiochemical purities above 95 %.