反应详情

温度

110 °C

A flask containing 2,5-dichloropyrimidine (2 g, 13.42 mmol), 3-methyl-5-(1,3-thiazol-5-yl)aniline (2.55 g, 13.42 mmol), PdOAc2 (0.603 g, 2.68 mmol), Xantphos (2.330 g, 4.03 mmol), and cesium carbonate (8.75 g, 26.8 mmol) was degassed for 5 min. Dioxane (89 ml) was added and argon was bubbled through the mixture for 15 min. The temperature was increased to 110° C. and the reaction was stirred 14 h at that temperature. The cooled reaction was diluted with brine and water and extracted three times with CH2Cl2. The organic layer was concentrated under reduced pressure and purified by flash chromatography (0-70% EtOAc:Hexanes) to give 5-chloro-N-[3-methyl-5-(1,3-thiazol-5-yl)phenyl]pyrimidin-2-amine (2.95 g, 73%) as a white solid. MS ESI: [M+H]+ m/z 303. 1H NMR (500 MHz, CDCl3) δ 8.75 (s, 1H), 8.37 (s, 2H), 8.08 (s, 1H), 7.71 (s, 1H), 7.33 (s, 1H), 7.09 (s, 1H), 2.40 (s, 3H). rhSYK activity=++.

1. customwas degassed for 5 min
2. additionDioxane (89 ml) was added
3. customargon was bubbled through the mixture for 15 min
4. customThe cooled reaction
5. extractionextracted three times with CH2Cl2
6. concentrationThe organic layer was concentrated under reduced pressure
7. custompurified by flash chromatography (0-70% EtOAc:Hexanes)