[Br:1][C:2]1[C:7]([NH2:8])=[CH:6][N:5]=[CH:4][N:3]=1.CC(C)([O-])C.[Na+].I[CH2:16][CH2:17][CH2:18][CH3:19].O>CC(N(C)C)=O>[Br:1][C:2]1[C:7]([NH:8][CH2:16][CH2:17][CH2:18][CH3:19])=[CH:6][N:5]=[CH:4][N:3]=1A mixture of 4-bromopyrimidin-5-amine (1 g, 5.75 mmol), sodium tert-butoxide (1.11 g, 11.5 mmol) and 1-iodobutane (1.11 g, 6.03 mmol) in DMA (15 mL) was heated at 60° C. for 15 hours. The mixture was poured into water and extracted with ethyl acetate. The acetate layer was washed with water, brine, dried with MgSO4, filtered, and concentrated under reduced pressure. The residue was purified by chromatography (hexanes-EtOAc 3:1) to afford 300 mg of the title compound. MS (ESI) m/z 230 (M+H)+.
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