Table 2. Preparation of SPIAd ylides and radiofluorination of heterocycles a .
aRadiochemical conversions by rTLC; identities confirmed by coinjection on radioHPLC; conditions: precursor (3.5 µmol), anhydrous DMF (0.4 mL), TEAB (0.6 mg), [18F]fluoride (ca. 50 µCi), 120 °C, 10 min.