Butylamine → N-Butyl-8-ethyl-2-methyl-8H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5-amine
Reaction equation
Cl[C:2]1[C:7]2[CH:8]=[N:9][C:10]3[N:14]([CH2:15][CH3:16])[N:13]=[CH:12][C:11]=3[C:6]=2[N:5]2[N:17]=[C:18]([CH3:20])[CH:19]=[C:4]2[N:3]=1.[CH2:21]([NH2:25])[CH2:22][CH2:23][CH3:24]>>[CH2:21]([NH:25][C:2]1[C:7]2[CH:8]=[N:9][C:10]3[N:14]([CH2:15][CH3:16])[N:13]=[CH:12][C:11]=3[C:6]=2[N:5]2[N:17]=[C:18]([CH3:20])[CH:19]=[C:4]2[N:3]=1)[CH2:22][CH2:23][CH3:24]Participants
3
Procedure
5.7 g of 5-chloro-8-ethyl-2-methyl-8H-pyrazolo[1,5-a]-pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine (0.02 mol) are dissolved in 50 ml of dry alcohol. After addition of 1.5 g of n-butylamine, the mixture is heated at reflux temperature with stirring for 12 hours. The solvent is removed and the crystalline residue is treated with water. The N-butyl-8-ethyl-2-methyl-8H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[4,3e]pyrimidin-5-amine is filtered off and recrystallized from ethyl acetate, yield 5 g (77%); m.p. 160°-162°.