[NH2:1][C:2]1[N:7]=[C:6]([CH3:8])[CH:5]=[C:4]([CH3:9])[N:3]=1.[Br:10]N1C(=O)CCC1=O>C(#N)C>[NH2:1][C:2]1[N:7]=[C:6]([CH3:8])[C:5]([Br:10])=[C:4]([CH3:9])[N:3]=1To a stirred solution containing 4.31 g (34.75 mmol) of 2-amino-4,6-dimethylpyrimidine (2) in 150 mL of acetonitrile were added 6.15 g (52.12 mmol) of N-bromosuccinimide. The reaction mixture was stirred at room temperature under argon atmosphere for 3 h. The formed precipitate was filtered and dried to afford the expected product as a white solid: yield 5.93 g (83%). 1H-NMR (CDCl3) δ 5.19 (br, 2H), 2.44 (s, 6H); 13C-NMR (CDCl3) δ 166.28, 160.73, 109.60, 24.70.
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