Cesium carbonate → 4-(4-bromo-2-tert-butyl-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-5-yl)-N-(2-methoxypyridin-4-yl)pyrimidin-2-amine

関与物質

反応条件

反応手順

A mixture of 4-(4-bromo-2-tert-butyl-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-5-yl)-2-chloropyrimidine (500 mg, 1.1 mmol; Example 6, Step 4), 2-methoxypyridin-4-amine (153 mg, 1.2 mmol), Pd(OAc)2 (30 mg, 0.14 mmol), XANTPHOS (117 mg, 0.20 mmol), cesium carbonate (731 mg, 2.2 mmol) in dry dioxane (9 ml) was sparged with N2 for 5 min. The reaction was sealed and heated at 100° C. for 2 hr. The reaction was allowed to cool to rt and partitioned between EtOAc and water. The layers were separated and the aqueous portion was extracted with EtOAc. The combined organic portions were dried (MgSO4) and concentrated to an orange residue which as purified by column chromatography (SiO2, 100:0-0:100, hexanes-EtOAc) to provide 386 mg of 4-(4-bromo-2-tert-butyl-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-5-yl)-N-(2-methoxypyridin-4-yl)pyrimidin-2-amine: LCMS (m/z): 533.2 (MH+), tR=0.92 min.

情報源と証拠