反应详情

温度

100 °C

2,5-dibromopyridine (474 mg, 2 mmol) and 2-Methyl-6-trifluoromethyl-pyridin-3-ylamine (352 g, 2 mmol) were dissolved in 1,4-dioxane (4 mL) in a pressure vessel. Pd2dba3 (55 mg, 0.06 mmol) and XANTPHOS (46 mg, 0.08 mmol) were added, followed by cesium carbonate (1.3 g, 4 mmol). The mixture was sparged with nitrogen for 10 minutes, then the vessel was sealed and heated at 100° C. for 18 hours. The mixture was partitioned between EtOAc and saturated aqueous NH4Cl, then the organic layer was washed with brine, dried with magnesium sulfate, filtered, and concentrated via rotary evaporation. The crude material was purified via column chromatography on silica gel, eluting with a gradient of EtOAc/hexanes (7-60%) to obtain the target compound as a solid: 1H NMR (400 MHz, CDCl3) δ ppm 2.62 (s, 3 H) 6.36 (br. s., 1 H) 6.75 (d, J=8.59 Hz, 1 H) 7.53 (d, J=8.34 Hz, 1 H) 7.69 (dd, J=8.84, 2.53 Hz, 1 H) 8.32-8.37 (m, 2 H); MS (M+H)+ 334.7.

1. customThe mixture was sparged with nitrogen for 10 minutes
2. customthe vessel was sealed
3. customThe mixture was partitioned between EtOAc and saturated aqueous NH4Cl
4. washthe organic layer was washed with brine
5. dry with materialdried with magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated via rotary evaporation
8. customThe crude material was purified via column chromatography on silica gel
9. washeluting with a gradient of EtOAc/hexanes (7-60%)