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Reagents and conditions: (a) (1) quinoline scaffolds (6 or 7), piperidine, AcOH, toluene, reflux, (2) Cu(acac)2, LiOH·H2O, N1,N2-bis(4-hydroxy-2,6-dimethylphenyl)oxalamide, DMSO/H2O, 80 °C, (3) tosyl scaffolds (1,2-bis(tosyloxy)ethane or triethylene glycol bis(p-toluenesulfonate), Cs2CO3, DMF, 100 °C; (b) Kryptofix 222, [18F]KF, DMF, 120 °C.
