[Cl:1][C:2]1[N:7]=[C:6](Cl)[C:5]([N:9]([CH3:11])[CH3:10])=[CH:4][N:3]=1.Cl.Cl.[NH:14]1[C:18]2[CH2:19][CH2:20][CH2:21][NH:22][C:17]=2[N:16]=[CH:15]1.C(=O)([O-])[O-].[K+].[K+]>C(O)(C)C.O>[Cl:1][C:2]1[N:7]=[C:6]([N:22]2[CH2:21][CH2:20][C:19]3[N:16]=[CH:15][NH:14][C:18]=3[CH2:17]2)[C:5]([N:9]([CH3:11])[CH3:10])=[CH:4][N:3]=15 g of 2,4-dichloro-5-dimethylamino-pyrimidine are dissolved in 30 mL isopropanol and combined with 5.82 g 4,5,6,7-tetrahydroimidazopyridine dihydrochloride and 6.06 g potassium carbonate. After 6 and 8 days in each case 1 g of 4,5,6,7-tetrahydroimidazopyridine dihydrochloride and 1 g potassium carbonate are added. In all, the mixture is stirred for 10 days at 25° C. The reaction mixture is diluted with 400 mL water and stirred for 1 h. The precipitate formed is suction filtered, washed and dried.
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