反应详情

2-(6-Amino-pyridin-3-yl)-2-methyl-propionic acid methyl ester (1.5 g, 7.7 mmol), 3,5- dibromo-1-methyl-1H-pyridin-2-one (2.05 g, 7.7 mmol), cesium carbonate (7.53 g, 23.1 mmol), bis(dibenzylideneacetone)palladium (353 mg, 0.385 mmol), and Xantphos (446 mg, 0.77 mmol) were added to a round bottom flask and the flask was purged with nitrogen. Degassed dioxane (50 ml) was added through a syringe. The reaction mixture was heated at 100 degrees centigrade overnight. The reaction mixture was filtered through celite and concentrated. The crude product was purified by flash chromatography using a gradient of 0% to 50% ethyl acetate in hexanes to give 1.8 g (62%) of 2-[6-(5-bromo-1-methyl-2-oxo-1,2-dihydro-pyridin-3-ylamino)-pyridin-3-yl]-2-methyl-propionic acid methyl ester.

1. customthe flask was purged with nitrogen
2. additionDegassed dioxane (50 ml) was added through a syringe
3. temperatureThe reaction mixture was heated at 100 degrees centigrade overnight
4. filtrationThe reaction mixture was filtered through celite
5. concentrationconcentrated
6. customThe crude product was purified by flash chromatography