C(N(CC)CC)C.[NH2:8][CH:9]([CH3:11])[CH3:10].[Br:12][C:13]1[C:14](Cl)=[N:15][C:16]([Cl:19])=[N:17][CH:18]=1>C(#N)C>[Br:12][C:13]1[C:14]([NH:8][CH:9]([CH3:11])[CH3:10])=[N:15][C:16]([Cl:19])=[N:17][CH:18]=13.3 ml (23.8 mmol) of triethylamine and 2.0 ml (23.3 mmol) of 2-aminopropane are added to a solution of 4.87 g (21.4 mmol) of 5-bromo-2,4-dichloropyrimidine in 23 ml of acetonitrile at 0° C. The reaction mixture is stirred at room temperature overnight and then the solvent is stripped off. The resulting residue is purified by chromatography (dichloromethane/ethanol 8:2). 4.09 g (16.4 mmol; yield: 76%) of the product are obtained.
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