[F:1][C:2]1[N:10]=[C:9]2[C:5]([NH:6][C:7]([CH2:11][C:12]3[CH:17]=[CH:16][C:15]([O:18][CH3:19])=[C:14]([O:20][CH3:21])[CH:13]=3)=[N:8]2)=[C:4]([NH2:22])[N:3]=1.C1C(=O)N([I:30])C(=O)C1.C(O)(C(F)(F)F)=O>C(#N)C>[F:1][C:2]1[N:10]=[C:9]2[C:5]([NH:6][C:7]([CH2:11][C:12]3[CH:13]=[C:14]([O:20][CH3:21])[C:15]([O:18][CH3:19])=[CH:16][C:17]=3[I:30])=[N:8]2)=[C:4]([NH2:22])[N:3]=1A solution of 2-Fluoro-8-(3,4-dimethoxy-benzyl)adenine (50 mg, 0.165 mmol), NIS (74 mg, 0.33 mmol), TFA (18.8 mg, 12.7 L, 0.165 mmol) in acetonitrile (120 L) was stirred at room temperature for 24 h. Following solvent removal, the product (12 mg, 16.9%) was collected through silica gel column purification (CHC13:MeOH:AcOH at 80:1:0.5 to 30:1:0.5). MS m/z 430.1 (M+H)+.
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