反应详情

9-H-carbazole (20 g, 120 mmol), and 2-bromopyridine (13 mL, 132 mmol) were mixed in dry toluene (500 mL). The solution was bubbled nitrogen while stirring for 15 min. Pd2(dba)3 (0.6 g, 0.66 mmol), dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-3-yl)phosphine (1 g, 0.24 mmol) and sodium tert-butoxide (20 g, 200 mmol) were added in sequence. The mixture was heated to reflux overnight under nitrogen. After cooling, the reaction mixture was filtered through Celite®/silica pad and the solvent was then evaporated. The residue was then purified by silica gel column chromatography using toluene:hexane (1:1, v/v) as eluent to obtain 24.3 g (83%) of the desired product.

1. customThe solution was bubbled nitrogen
2. temperatureThe mixture was heated
3. temperatureto reflux overnight under nitrogen
4. temperatureAfter cooling
5. filtrationthe reaction mixture was filtered through Celite®/silica pad
6. customthe solvent was then evaporated
7. customThe residue was then purified by silica gel column chromatography