反应详情

To a solution of 2-pyridazin-4-yl-4-(trifluoromethyl)phenol (Preparation 712, 60.6 mg, 0.25 mmol) in dimethylsulfoxide (2.5 mL) was added 3-cyano-N-(2,4-dimethoxybenzyl)-4-fluoro-N-1,2,4-thiadiazol-5-ylbenzenesulfonamide (Preparation 68, 109.2 mg, 0.25 mmol) followed by potassium carbonate (101.7 mg, 0.74 mmol). The resulting mixture was stirred overnight at room temperature under nitrogen. The reaction mixture was poured into water (125 mL), and extracted with ethyl acetate (3×25 mL). The combined organic extract was washed successively with aqueous sodium hydroxide solution (1M, 15 mL) and saturated aqueous sodium chloride solution (4×25 mL), dried over anhydrous sodium sulfate, filtered and the solvent removed in vacuo. The resulting residue was purified by column chromatography using a gradient of 25-40% v/v ethyl acetate in heptane to give the title compound as a white foam (59.7 mg, 36%).

1. extractionextracted with ethyl acetate (3×25 mL)
2. extractionThe combined organic extract
3. washwas washed successively with aqueous sodium hydroxide solution (1M, 15 mL) and saturated aqueous sodium chloride solution (4×25 mL)
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. customthe solvent removed in vacuo
7. customThe resulting residue was purified by column chromatography