Tetrahedron Letters (2021)
Update date:2022-08-05
Topics:
Mou, Zhaobiao
Chen, Xueyuan
Wang, Chao
Wang, Tao
Yang, Hongzhang
Li, Zijing
18F-Labeled organofluorophosphates are important radiosynthons that have only been previously accessible via 18/19F-isotope-exchange with limited molar activities. Herein, a novel 18F-fluorination methodology has been developed to prepare 18F-labeled phosphorofluoridates and phosphonofluoridic acids via the [18F]F? nucleophilic substitution of imidazole-activated precursors. The efficient one-step 18F-fluorination affords stable products in the presence of Zn(Ⅱ) with high radiochemical yields and high molar activities. This 18F-fluorination method could be used to prepare various phosphorofluoridate and phosphonofluoridic acid analogs for use as 18F-radiosynthons and potential positron emission tomography tracers.
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