反应详情

温度

70 °C

A mixture of the compound of Example 20 (0.070 g, 0.19 mmol), propyl isocyanate (0.088 mL, 0.94 mmol), and TEA (0.14 g, 1.1 mmol) in THF (4.0 mL) was stirred at 70° C. for 16 h. The mixture was filtered, washed with THF, and the solvent was removed under reduced pressure. The residue was dissolved in EtOAc (50 mL) and washed with saturated aqueous sodium bicarbonate (50 mL), dried and the solvent was removed under reduced pressure. The resulting solid was chromatographed on silica gel to yield 2-(4-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)-2,6-dimethyl-phenoxy)ethyl propylcarbamate (0.035 g, 41%) as an off-white solid: Selected data: 1H NMR (300 MHz, DMSO-d6) δ 11.82 (s, 1H), 7.90 (s, 2H), 7.23 (t, J=5.27 Hz, 1H), 6.74 (d, J=2.32 Hz, 1H), 6.52 (d, J=2.31 Hz, 1H), 4.27 (t, J=4.29 Hz, 2H), 3.99 (t, J=4.29 Hz, 2H), 3.89 (s, 3H), 3.84 (s, 3H), 3.02-2.86 (m, 2H), 2.29 (s, 6H), 1.50-1.30 (m, 2H), 0.84 (t, J=7.33 Hz, 3H); MS (APCI) m/z 456 [M+H]+.

1. filtrationThe mixture was filtered
2. washwashed with THF
3. customthe solvent was removed under reduced pressure
4. dissolutionThe residue was dissolved in EtOAc (50 mL)
5. washwashed with saturated aqueous sodium bicarbonate (50 mL)
6. customdried
7. customthe solvent was removed under reduced pressure
8. customThe resulting solid was chromatographed on silica gel