Br[CH2:2][CH2:3][NH:4][C:5]1[CH:10]=[C:9]([Cl:11])[N:8]=[C:7](Cl)[N:6]=1.C([O-])([O-])=[O:14].[K+].[K+]>O1CCOCC1.O>[Cl:11][C:9]1[CH:10]=[C:5]2[NH:4][CH2:3][CH2:2][N:6]2[C:7](=[O:14])[N:8]=1To a mixture of N-(2-bromoethyl)-2,6-dichloropyrimidin-4-amine (10 g, 18 mmol) in 1,4-dioxane (30 mL) and water (30.0 mL) was added K2CO3 (4.85 g, 35.1 mmol). The reaction mixture was stirred at 70° C. for 4 h, and then directly used into next step without further purification.
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