反应详情

温度

0 °C

Phosgene (1.8 mL, 3.6 mmol, 1.9 M in toluene) was added dropwise to a cooled (0° C.) solution of triethylamine (0.57 mL, 4.0 mmol) and 4,5-bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluro-phenyl)-4,5-dihydro-1H-imidazole (550 mg, 1.2 mmol, example 1) in methylene chloride (5.0 mL). The reaction mixture was stirred for 0.5 h at 0° C. The solvent was removed under reduced pressure. The residue was kept under high vacuum for 30 min and dissolved in methylene chloride (5.0 mL). Triethylamine (0.170, 1.2 mmol) and 4-(hydroxymethyl)piperidine (0.50 g, 4.4 mmol) were added. After 1 h, the reaction was worked up with aqueous sodium bicarbonate and extracted with methylene chloride. The organic extracts were washed with brine and dried over anhydrous sodium sulfate. Evaporation of the solvents and flash chromatography of the residue over silica gel using 1-4% methanol in methylene chloride gave [4,5-bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazol-1-yl]-[4-hydroxymethyl-piperidin-1-yl]-methanone (560 mg, 79%).

1. customThe solvent was removed under reduced pressure
2. waitThe residue was kept under high vacuum for 30 min
3. dissolutiondissolved in methylene chloride (5.0 mL)
4. waitAfter 1 h
5. extractionextracted with methylene chloride
6. washThe organic extracts were washed with brine
7. dry with materialdried over anhydrous sodium sulfate
8. customEvaporation of the solvents and flash chromatography of the residue over silica gel using 1-4% methanol in methylene chloride