Water → HCID 178460611, 화합물

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To a stirred solution of 2-bromo-4-(5-chloropyridin-3-yl)-3-[(trans-4-methylcyclohexyl)methyl]-3H-imidazo[4,5-c]pyridine-6-carbonitrile (Preparative Example 3.1; 3.0 g, 6.93 mmol) in 1,4-dioxane (60 mL), tert-butyldimethyl((2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)allyl)oxy)silane (3.09 g 10.39 mmol), potassium phosphate (2.94 g, 13.86 mmol), and water (6 mL) were added, and the mixture was degassed with argon for 15 minutes. PdCl2(dppf) (0.85 g, 1.04 mmol), was added, and the mixture was degassed with argon again for 5 minutes. The reaction was then heated at 100° C. for 16 h. The reaction mixture was cooled to room temperature, quenched with water (20 mL), and extracted with ethyl acetate (100 mL). The organic layer was separated, washed with brine (50 mL), dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by column chromatography using 15% ethyl acetate/petroleum ether as eluent to yield 2-(3-{[tert-butyl(dimethyl)silyl]oxy}prop-1-en-2-yl)-4-(5-chloropyridin-3-yl)-3-[(trans-4-methylcyclohexyl)methyl]-3H-imidazo[4,5-c]pyridine-6-carbonitrile. MS ES/APCI calcd. for C29H38ClN5OSi [M+H]+ 536. found 536.

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