Scheme 1.
Synthesis of [18F]8. Reaction condition: 18F-, 9 (6.2 μmol), TEAB (14.1 μmol), [Cu(OTf)2py4] (13.3 μmol), DMA (0.8 mL), n-Butanol (0.4 mL), T = 130 °C, 10 min
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