反应详情

温度

100 °C

To a mixture of 2-(6-bromo-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.196 g, 0.50 mmol), 1-isopropylpiperazine (0.077 g, 0.60 mmol), BINAP (0.062 g, 0.10 mmol), and Cs2CO3 (0.652 g, 2.0 mmol) in nitrogen saturated dioxane (10 mL) was added palladium(II) acetate (0.022 g, 0.10 mmol). The resulting mixture was heated at 100° C. for 3 h. After that time the reaction was cooled to rt, diluted with dichloromethane (100 mL) and washed with water (20 mL). The organic phase was dried over Na2SO4 and concentrated under reduced pressure. The product was purified by flash column chromatography (silica gel, 90:10:0.1 dichloromethane/methanol/ammonium hydroxide) to give 2-(6-(4-isopropylpiperazin-1-yl)-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.055 g, 25%) as a pale yellow solid: mp 208-210° C.; 1H NMR (400 MHz, CDCl3): δ 10.23 (br s, 1H), 8.08 (d, J=8.0 Hz, 1H), 7.17 (d, J=8.0 Hz, 1H), 6.79 (d, J=2.4 Hz, 1H), 6.45 (d, J=2.4 Hz, 1H), 3.98 (s, 3H), 3.95 (s, 3H), 3.93 (s, 3H), 3.56 (br s, 4H), 2.78 (br s, 5H), 1.15 (d, J=5.6 Hz, 6H); ESI MS m/z 440 [M+H]+.

1. temperatureAfter that time the reaction was cooled to rt
2. washwashed with water (20 mL)
3. dry with materialThe organic phase was dried over Na2SO4
4. concentrationconcentrated under reduced pressure
5. customThe product was purified by flash column chromatography (silica gel, 90:10:0.1 dichloromethane/methanol/ammonium hydroxide)