[Br:1][C:2]1[N:7]=[CH:6][C:5]([C:8](=[O:10])[CH3:9])=[CH:4][CH:3]=1.[Br:11]Br>C(Cl)(Cl)Cl.C([O-])(O)=O.[Na+].[Cl-].[Al+3].[Cl-].[Cl-]>[Br:11][CH2:9][C:8]([C:5]1[CH:6]=[N:7][C:2]([Br:1])=[CH:3][CH:4]=1)=[O:10]To a solution of 1-(6-bromo-pyridin-3-yl)-ethanone (20.3 g, 101 mmol) and aluminum chloride (200 mg, 1.5 mmol) in chloroform (288 mL) was added bromine (5.23 mL, 101 mmol). The mixture was stirred at rt for 16 h. Upon completion of the reaction as judged by LC/MS analysis, the solution was diluted with sat aq NaHCO3 and extracted with DCM. The organic layer was removed, dried over MgSO4, filtered and concentrated giving rise to 31 g 2-bromo-1-(6-bromopyridin-3-yl)ethanone, which was taken on immediately. LC/MS: m/e 277.9 (M+H).
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