[NH2:1][C:2]1[CH:7]=[N:6][C:5]([Br:8])=[CH:4][N:3]=1.[C:9](I)([F:12])([F:11])[F:10].OO>CS(C)=O.[Cl-].[Na+].O.[CH-]1C=CC=C1.[CH-]1C=CC=C1.[Fe+2]>[Br:8][C:5]1[N:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[C:2]([NH2:1])=[N:3][CH:4]=1To a solution of 2-amino-5-bromopyrazine (174 mg, 1 mmol) in DMSO (3 ml) stifling under Ar is added ferrocene (56 mg, 0.3 mmol) and degassed for 5 minutes with Ar. 2 ml of 1N H2SO4 in DMSO is added, followed by CF3I (0.276 ml, 3 mmol) in DMSO (2 ml), giving a slight yellow solution. 0.2 ml of 30% H2O2 is added slowly, causing the reaction to go from yellow to dark green in color. The reaction was heated to 50° C. for 2 hours under Ar. After cooling to room temperature, the reaction mixture is poured into brine, and product is extracted with EtOAc (4×20 ml). The combined organic fractions are dried with magnesium sulfate, filtered, then concentrated in vacuo. The crude material was purified by flash chromatography (SiO2, Biotage SNAP 10 g, 0-50% EtOAc/hept) which yields 70 mg of title compound; m/z 242.0, 244.0 (M, M+2H)
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