反应详情

温度

100 °C

To a 1,4-dioxane (0.7 mL) solution of 3-[2,6-dimethoxy-4-(methoxymethyl)phenyl]-6-methoxy-N-propylpyrazolo[5,1-b][1,3]thiazole-7-amine (70 mg, 0.179 mmol) were added 3-bromopyridine (33.9 mg, 0.215 mmol), cesium carbonate (99.1 mg, 0.304 mmol), tris(dibenzylideneacetone)dipalladium (8.2 mg, 0.009 mmol) and 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (7.77 mg, 0.0134 mmol), and the mixture was stirred at 100° C. for eight hours. After the reaction mixture was returned to room temperature, water was added to the reaction mixture, and the reaction mixture was extracted with ethyl acetate, and the solvent was distilled off under reduced pressure. The residue was purified by medium pressure amino silica gel column chromatography (n-heptane/ethyl acetate: 10% then 60%) to obtain the title compound (32.4 mg, 0.0692 mmol).

1. customwas returned to room temperature
2. extractionthe reaction mixture was extracted with ethyl acetate
3. distillationthe solvent was distilled off under reduced pressure
4. customThe residue was purified by medium pressure amino silica gel column chromatography (n-heptane/ethyl acetate