反应详情

To 2,4-dibromo-3,5-difluoro-6-(2-fluoro-5-nitrophenyl)pyridine (1.20 g, 2.91 mmol) dissolved in dichloromethane (30 ml) was added triethylamine (3 ml) and ethanol (80 ml), followed by 10% palladium on carbon (0.536 g). The mixture was then shaken under an atmosphere of hydrogen gas at 45 psi until complete reaction was indicated by TLC (0.25 to 3.5 h). The catalyst was then removed by filtration, and the solvent was stripped at reduced pressure to afford 3-(3,5-difluoropyridin-2-yl)-4-fluorophenylamine, which was used subsequently without further purification: MS (ES+) m/z 225 [M+H]+.

1. customwas indicated by TLC (0.25 to 3.5 h)
2. customThe catalyst was then removed by filtration