反应详情

To a cooled (0° C.) solution of [4,5-bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazol-1-yl]-[4-hydroxy methyl-piperidin-1-yl]-methanone (60 mg, 0.096 mmol) in methylene chloride (2 mL) was added carbon tetrabromide (70 mg, 0.210 mmol) followed by triphenyl phosphine (55 mg, 0.21 mmol). The reaction mixture was stirred at ambient temperature for 2.5 h. The reaction was diluted with water and extracted with methylene chloride. The organic extracts were washed with water, brine, and dried over anhydrous sodium sulfate. Evaporation of the solvents and chromatography of the residue over silica gel using 1-5% methanol in methylene chloride gave [4,5-bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazol-1-yl]-[4-bromomethyl-piperidin-1-yl]-methanone (50 mg, 76%).

1. extractionextracted with methylene chloride
2. washThe organic extracts were washed with water, brine
3. dry with materialdried over anhydrous sodium sulfate
4. customEvaporation of the solvents and chromatography of the residue over silica gel using 1-5% methanol in methylene chloride