Sulfuric Acid → HCID 178461253, compound

Participants

Reaction Conditions

Reaction Steps

In an oven-dried, nitrogen cooled flask were placed palladium(II) acetate (438 mg, 1.95 mmol) and (R)-(+)-2,2′-Bis(diphenylphosphino)-1,1′-binaphthyl (1.22 g, 1.95 mmol). N,N-dimethylacetamide (98 mL) was added, and the flask was degassed for three minutes with nitrogen (sparge). Sulfuric acid (0.104 mL, 1.95 mmol) was added, and the flask was degassed for three minutes with nitrogen (sparge). The flask was sealed and heated to 80° C. for 30 minutes. The mixture was cooled to room temperature and added to a separate nitrogen purged flask containing 6-chloro-4-(5-chloropyridin-3-yl)-3-[(trans-4-methylcyclohexyl)methyl]-3H-imidazo[4,5-c]pyridine (7.33 g, 19.5 mmol), zinc cyanide (1.15 g, 9.77 mmol), and zinc (128 mg, 1.95 mmol). The flask was purged with nitrogen for five minutes, then sealed and heated to 100° C. for 3.5 hours. The reaction mixture was cooled to room temperature, filtered, diluted with ethyl acetate, and washed with water and brine. The organic layer was 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 4-(5-chloropyridin-3-yl)-3-[(trans-4-methylcyclohexyl)methyl]-3H-imidazo[4,5-c]pyridine-6-carbonitrile. MS ESI calc'd. for C20H20ClN5 [M+H]+ 366. found 366.

Provenance & Evidence