3-Bromo-1,1,1-trifluoro-2-propanone → 4-hydroxy-1-[4-(methylsulfonyl)phenyl]-2-phenyl-4-trifluoromethyl-4,5-dihydro-1H-imidazole

関与物質

反応手順

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.

情報源と証拠