反应详情

温度

70 °C

A 100 ml flask was charged with 4-((2-chloropyridin-4-yl)oxy)aniline (150 mg, 0.68 mmol), 1-tert-butyl 2-methyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrole-1,2-dicarboxylate (260 mg, 0.8 mmol), 2M Na2CO3 solution (0.5 ml, 1.0 mmol), PdCl2(PPh3)2 (5 mg, 0.007 mmol), 10 ml of 1,4-dioxane and 3 ml of water. The mixture was flushed with nitrogen and heated at 70° C. for 30 minutes. The mixture was cooled to room temperature and poured into 100 ml of water. The precipitates were filtered and dried to give the crude, which was further purified by silica gel chromatography eluting with 2-3% MeOH/CHCl3 to give 1-tert-butyl 2-methyl 4-[4-(4-aminophenoxy)pyridin-2-yl]-1H-pyrrole-1,2-dicarboxylate as light brown oil. Yield: 240 mg, 86%.

1. customThe mixture was flushed with nitrogen
2. temperatureThe mixture was cooled to room temperature
3. additionpoured into 100 ml of water
4. filtrationThe precipitates were filtered
5. customdried
6. customto give the crude, which
7. customwas further purified by silica gel chromatography
8. washeluting with 2-3% MeOH/CHCl3