Cesium carbonate → HCID 178455731, 화합물

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Racemic 4,6-dichloro-3-[1-(trans-4-methylcyclohexyl)ethyl]-3H-imidazo[4,5-c]pyridine (Preparative Example 4.3) (5 g, 16 mmol), 5-chloropyridine-3-boronic acid (2.77 g, 17.61 mmol), cesium carbonate (15.65 g, 48 mmol), and 1,1′-Bis(diphenylphosphino)ferrocene-palladium(II)dichloride (1.17 g, 1.6 mmol) were combined in a flask that had been oven-dried and flushed with nitrogen. Dioxane (43 mL) and water (10.6 mL) were added, and the vial was capped and heated to 90° C. for 3 hours. The reaction mixture was cooled to room temperature, diluted with ethyl acetate, and washed with water. The organic layer was washed with brine, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography (0-100% ethyl acetate/hexanes, linear gradient) to afford racemic 6-chloro-4-(5-chloropyridin-3-yl)-3-[1-(trans-4-methylcyclohexyl)ethyl]-3H-imidazo[4,5-c]pyridine. MS ESI calc'd. for C20H22Cl2N4 [M+H]+ 389. found 389.

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