[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([Br:8])=[CH:4][N:3]=1.CO[C:11](OC)([N:13]([CH3:15])[CH3:14])[CH3:12]>CN(C)C=O>[Br:8][C:5]1[CH:6]=[CH:7][C:2]2[N:3]([N:13]=[C:11]([CH3:12])[N:1]=2)[CH:4]=1.[Br:8][C:5]1[CH:6]=[CH:7][C:2]([N:1]=[C:11]([N:13]([CH3:15])[CH3:14])[CH3:12])=[N:3][CH:4]=1To a stirred solution of 2-amino-5-bromopyridine (1.73 g, 10 mmol) in N,N-dimethylformamide (20 mL) was added dimethylacetamide dimethylacetal (3.99 g, 30 mmol). The reaction mixture was heated to 130° C. overnight. After cooling to room temperature, the volatiles were removed under reduced pressure to afford the desired product N′-(5-bromo-pyridin-2-yl)-N,N-dimethyl-acetamidine as a brown oil.
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