反应详情

To a round bottom flask is added 2-chloro-3,5-difluoropyridine (1.5 g, 10 mmol), 4-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (2.2 g, 10 mmol), Pd(PPh3)4 (300 mg, 0.26 mmol), toluene (60 mL), ethanol (20 mL) and 2M Na2CO3 (20 mL, 40 mmol). The reaction is stirred under reflux condition for 15 hours. After cooling, the reaction mixture is diluted with ethyl acetate, washed with brine and dried over Na2SO4. The organic phase is then dried by rotary evaporation. The crude product is purified by silica gel flash chromatography to afford 3-(3,5-difluoropyridin-2-yl)-4-methylaniline as a light brown solid. MS m/z 221.1 (M+1).

1. temperatureunder reflux condition for 15 hours
2. temperatureAfter cooling
3. washwashed with brine
4. dry with materialdried over Na2SO4
5. customThe organic phase is then dried by rotary evaporation
6. customThe crude product is purified by silica gel flash chromatography