Dibromodifluoromethane → HCID 86698189, compound

Participants

Reaction Conditions

Reaction Steps

To a tetrahydrofuran (70 mL) solution containing dibromodifluoromethane (5.09 g) was added dropwise hexamethyl phosphoric triamide (8.81 mL) at −78° C. The temperature of the mixture was returned to room temperature, and the mixture was stirred for 30 minutes. The mixture was cooled to −78° C., and a tetrahydrofuran (20 mL) solution of 2-(6-{4-[(4-methoxybenzyl)oxy]phenyl}pyridin-3-yl)-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-imidazol-4-carbaldehyde (1.25 g) was added dropwise thereto. The temperature of the mixture was returned to room temperature, and the mixture was stirred for 3 hours. To the mixture were added ethyl acetate, water and a saturated aqueous sodium bicarbonate solution, and the liquids were separated. The organic layer was separated, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=85:15 to 55:45) to obtain 5-[4-(2,2-difluoroethenyl)-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-imidazol-2-yl]-2-{4-[(4-methoxybenzyl)oxy]phenyl}pyridine (0.84 g).

Provenance & Evidence