Sulfur [18F]Fluoride Exchange Click Chemistry Enabled Ultrafast Late-Stage Radiosynthesis.
Qinheng ZhengHongtao XuHua WangWen-Ge Han DuNan WangHuan XiongYuang GuLouis NoodlemanK Barry SharplessGuang YangPeng WuPublished in: Journal of the American Chemical Society (2021)
The lack of efficient [18F]fluorination processes and target-specific organofluorine chemotypes remains the major challenge of fluorine-18 positron emission tomography (PET). We report here an ultrafast isotopic exchange method for the radiosynthesis of novel PET agent aryl [18F]fluorosulfate enabled by the emerging sulfur fluoride exchange (SuFEx) click chemistry. The method has been applied to the fully automated 18F-radiolabeling of 25 structurally and functionally diverse aryl fluorosulfates with excellent radiochemical yield (83-100%, median 98%) and high molar activity (280 GBq μmol-1) at room temperature in 30 s. The purification of radiotracers requires no time-consuming HPLC but rather a simple cartridge filtration. We further demonstrate the imaging application of a rationally designed poly(ADP-ribose) polymerase 1 (PARP1)-targeting aryl [18F]fluorosulfate by probing subcutaneous tumors in vivo.
Keyphrases
- positron emission tomography
- pet imaging
- room temperature
- computed tomography
- pet ct
- drinking water
- ms ms
- ionic liquid
- high resolution
- dna damage
- machine learning
- dna repair
- simultaneous determination
- cancer therapy
- high performance liquid chromatography
- photodynamic therapy
- tandem mass spectrometry
- drug delivery
- structural basis