反应详情

温度

90 °C

A suspension of the product from Example 1C (2.00 g, 9.42 mmol), ethyl 5-bromonicotinate (2.80 g, 12.0 mmol), tris(dibenzylideneacetone)dipalladium(0) (259 mg, 0.283 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (491 mg, 0.848 mmol) and cesium carbonate (4.91 g, 15.1 mmol) in anhydrous dioxane (50 mL) were heated at 90° C. for 72 hours. The reaction mixture was cooled and filtered through a glass frit. The filtrate was concentrated and the residue was purified by silica gel chromatography (eluted with 50% EtOAc in hexane) to afford the title compound (3.2 g, 94%). MS (APCI) m/z 362 (M+H)+.

1. temperatureThe reaction mixture was cooled
2. filtrationfiltered through a glass frit
3. concentrationThe filtrate was concentrated
4. customthe residue was purified by silica gel chromatography (eluted with 50% EtOAc in hexane)