Cl[C:2]1[CH:7]=[C:6]([Cl:8])[N:5]=[C:4]([C:9]2[CH:14]=[CH:13][C:12]([Cl:15])=[C:11]([Cl:16])[CH:10]=2)[N:3]=1.[CH3:17][N:18]([CH3:22])[CH2:19][CH2:20][NH2:21]>O>[Cl:8][C:6]1[CH:7]=[C:2]([NH:21][CH2:20][CH2:19][N:18]([CH3:22])[CH3:17])[N:3]=[C:4]([C:9]2[CH:14]=[CH:13][C:12]([Cl:15])=[C:11]([Cl:16])[CH:10]=2)[N:5]=1Seven grams of 4,6-dichloro-2-(3,4-dichlorophenyl)pyrimidine is added in small portions to 25 ml. of N,N-dimethylethylenediamine with slight warming and stirring. The resulting mixture is heated on a steam bath for several minutes then poured into 500 ml. of water. The product thus obtained is recrystallized from n-heptane to afford 4-chloro-2-(3,4-dichlorophenyl)-6-[2-(dimethylamino)ethylamino]-pyrimidine, m.p. 99.5°-102°C.
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