反应详情

温度

96 °C

A mixture of 1-(5-acetyl-4-methylthiazol-2-yl)-3-((2,2-difluorocyclopropyl)-methyl)imidazolidin-2-one (0.32 g, 1.00 mmol) and N,N-dimethylformamidediemthyl acetal (0.24 g, 2.00 mmol) in anhydrous N,N-dimethylformamide (10.0 mL) was heated at 96° C. for 16 h and cooled to ambient temperature, followed by the addition of hydrazine monohydrate (1.0 mL). The mixture was heated at 96° C. for 0.5 h and cooled to ambient temperature, followed by the addition of water (20.0 mL). The pale yellow solid formed was collected by filtration and triturated with ethyl acetate and methanol to afford the title compound as a yellow solid (0.21 g, 90%): mp 227-230° C.; 1H NMR (300 MHz, DMSO-d6) δ 12.89 (s, 1H), 7.76 (s, 1H), 6.41 (s, 1H), 3.97 (t, J=9.0 Hz, 2H), 3.63-3.47 (m, 3H), 3.18-3.10 (m, 1H), 2.37 (s, 3H), 2.03-1.88 (m, 1H), 1.67-1.55 (m, 1H), 1.36-1.25 (m, 1H); 13C NMR (75 MHz, DMSO-d6) δ 155.8, 155.5, 144.0, 142.4, 130.3, 118.7, 114.9 (t), 103.2, 42.5, 42.2, 41.2 (d), 20.4 (t), 15.1 (t); MS (ES+) m/z 340.9 (M+1).

1. temperaturecooled to ambient temperature
2. temperatureThe mixture was heated at 96° C. for 0.5 h
3. temperaturecooled to ambient temperature
4. customThe pale yellow solid formed
5. filtrationwas collected by filtration
6. customtriturated with ethyl acetate and methanol