反应详情

温度

100 °C

5-Chloro-3-methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (1-3, 516 mg, 2.81 mmol) and cesium carbonate (4.97 g, 15.26 mmol) were added to a round bottom flask and suspended in NMP (4.6 mL) under nitrogen. 1,1-Difluoro-2-(iodomethyl)cyclopropane (481 μL, 5.06 mmol) was added to the suspension and then heated to 100° C. in microwave reactor for 10 min. Following this duration, the reaction was cooled to room temperature and suspended in ethyl acetate and sodium bicarbonate. The suspension was washed with sodium bicarbonate, brine(×5), dried over sodium sulfate, filtered, and concentrated. The mixture was purified using reverse-phase chromatography (5-95% 0.1% TFA in H2O:acetonitrile) to give 5-chloro-1-[(2,2-difluorocyclopropyl)methyl]-3-methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (6-1) as an off-white solid. MS m/z (M+H): calculated=274.0553; observed=274.0551.

1. temperaturethe reaction was cooled to room temperature
2. washThe suspension was washed with sodium bicarbonate, brine(×5)
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated
6. customThe mixture was purified