4-Chloro-6,7-dimethoxyquinazoline → HCID 20263805, compound

Reaction equation

[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][C:12]=1[O:13][CH3:14])[N:9]=[CH:8][N:7]=[C:6]2[Cl:15].[CH2:16]([NH:20][C:21](=[O:24])[NH:22][NH2:23])[CH2:17][CH2:18][CH3:19]>CCCCCO>[ClH:15].[CH2:4]([NH:23][NH:22][C:21]([NH:20][C:6]1[C:5]2[C:10](=[CH:11][C:12]([O:13][CH3:14])=[C:3]([O:2][CH3:1])[CH:4]=2)[N:9]=[CH:8][N:7]=1)=[O:24])[CH2:3][CH2:12][CH3:11].[CH2:16]([N:20]([C:6]1[C:5]2[C:10](=[CH:11][C:12]([O:13][CH3:14])=[C:3]([O:2][CH3:1])[CH:4]=2)[N:9]=[CH:8][N:7]=1)[C:21](=[O:24])[NH:22][NH2:23])[CH2:17][CH2:18][CH3:19]

Participants

Procedure

3 g of 6,7-dimethoxy-4-chloro-quinazoline were stirred with 3.5 g of 4-n-butyl-semicarbazide in 100 ml of n-amyl alcohol for 2 hours at 100° C. Then, the precipitate which had formed was suction-filtered off, suspended while in hot ethanol and brought to pH 5 by the addition of 2N hydrochloric acid. The clear solution was filtered through charcoal, cooled, suction-filtered and dried in a circulating air drier. The hydrochloride of 4-n-butyl-4-(6,7-dimethoxyquinazol-4-yl)-semi-carbazide, which was obtained with a 70% yield, melted at 216°-217° C. The following compounds were obtained analogously.