Hydrochloric Acid → HCID 178463642, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-acetylamino-2-(4-fluorophenyl)-4-phenyl-imidazole (142 mg) in tetrahydrofuran (7 ml) was added 10M borane.tetrahydrofuran complex (12 ml, tetrahydrofuran solution), and the mixture was stirred under argon atmosphere at room temperature for 2 days. To the reaction mixture was slowly added 10% hydrochloric acid, and the mixture was stirred at 60° C. for 10 minutes. After cooling, the mixture was neutralized by adding a saturated aqueous sodium hydrogen carbonate solution, and extracted with ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure. The resulting residue was purified by silica gel flush column chromatography (solvent: hexane:ethyl acetate=1:2), and then, treated with hydrogen chloride-methanol solution to obtain 5-ethylamino-2-(4-fluorophenyl)-4-phenyl-imidazole hydrochloride (89 mg) as colorless powder.

Provenance & Evidence