反应详情

To a mixture of N-[4-(methylsulfonyl)phenyl]benzenecarboximidamide (Step 1) (10 mmol) and sodium bicarbonate (20 mmol) in isopropanol (100 mL), 3-bromo-1,1,1-trifluoroacetone (20 mmol) is added. After heating the reaction mixture at 70°-75° C. for 20 hours, the solvent is removed. The residue is redissolved in methylene chloride and washed with water. The organic fractions are combined, dried over sodium sulfate, filtered and concentrated in vacuo. The crude mixture is chromatographed (silica gel, toluene/ethyl acetate, 7/3) to give 4-hydroxy-1-[4-(methylsulfonyl)phenyl]-2-phenyl -4-trifluoromethyl-4,5-dihydro-1H-imidazole.

1. additionis added
2. temperatureAfter heating the reaction mixture at 70°-75° C. for 20 hours
3. customthe solvent is removed
4. dissolutionThe residue is redissolved in methylene chloride
5. washwashed with water
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customThe crude mixture is chromatographed (silica gel, toluene/ethyl acetate, 7/3)