Formamide → HCID 135744166、化合物
反応式
[NH2:1][C:2]1[CH:12]=[C:11]([O:13][CH2:14][C:15]([F:18])([F:17])[F:16])[C:10]([O:19][CH3:20])=[CH:9][C:3]=1[C:4](OCC)=[O:5].[CH:21]([NH2:23])=O>C(O)C>[CH3:20][O:19][C:10]1[CH:9]=[C:3]2[C:2](=[CH:12][C:11]=1[O:13][CH2:14][C:15]([F:18])([F:17])[F:16])[N:1]=[CH:21][NH:23][C:4]2=[O:5]参加物
4
反応条件
- 温度
- 175 °C
実験手順
A mixture of ethyl 2-amino-4-(2,2,2-trifluoroethoxy)-5-methoxybenzoate (20.2 g, 69.1 mmol) and formamide (50 ml) was heated at 175° C. for 6 hours. The mixture was allowed to cool to ambient temperature, ethanol (150 ml) was added and the reaction allowed to stand for 18 hours. Collection of the solid which had precipitated by suction filtration, followed by washing with ethanol (2×50 ml) and drying in vacuo, yielded 6-methoxy-7-(2,2,2-trifluoroethoxy)-3,4-dihydroquinazolin-4-one (15.8 g, 84% yield) as a pale brown crystalline solid: