Cesium carbonate → N-(5-Chloro-2-methoxypyridin-3-yl)-2-methylpyrimidin-4-amine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 1,4-dioxane (30 mL), 3-bromo-5-chloro-2-methoxypyridine (865 mg, 3.9 mmol), 2-methylpyrimidin-4-amine (327 mg, 3.0 mmol), Pd2(dba)3 (275 mg, 0.30 mmol), XantPhos (173.4 mg, 0.30 mmol), and cesium carbonate (1.96 g, 6.0 mmol). After three cycles of vacuum/argon flush, the mixture was heated at 100° C. for 5 h. After this time the reaction was cooled to room temperature. It was then filtered and the filtrate was evaporated in vacuo. The residue was purified by silica-gel column chromatography eluting with 5:1 ethyl acetate/petroleum ether to afford 222a (555 mg, 74%) as a white solid. MS-ESI: [M+H]+ 251.0

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