Cl[C:2]1[C:7]2[CH:8]=[N:9][CH:10]=[CH:11][C:6]=2[N:5]2[N:12]=[C:13]([CH3:15])[CH:14]=[C:4]2[N:3]=1.[CH2:16]([NH2:20])[CH2:17][CH2:18][CH3:19]>>[CH2:16]([NH:20][C:2]1[C:7]2[CH:8]=[N:9][CH:10]=[CH:11][C:6]=2[N:5]2[N:12]=[C:13]([CH3:15])[CH:14]=[C:4]2[N:3]=1)[CH2:17][CH2:18][CH3:19]2.2 g. of 5-chloro-2-methylpyrazolo[1,5-a]pyrido[3,4-e]pyrimidine of Example 18 are refluxed in 10 ml. of n-butylamine for 12 hours. The excess amine is evaporated and the residue treated with 10 ml. of water. N-Butyl-2-methylpyrazolo[1,5-a]pyrido[3,4-e]pyrimidin-5-amine is filtered off, yield: 2 g. (80%); m.p. 116.1° (methanol).
読み込み中…