反応 #74521
ord-66ae178b66f447ec9b0973a525fc3e92
反応方程式
反応物
試薬
反応条件
後処理
- 1その他The reaction was quenched by the addition of ethyl acetate (20 mL) and saturated aqueous brine solution (20 mL)
- 2その他The organic layer was collected
- 3乾燥dried over sodium sulphate
- 4濃縮concentrated in vacuo before purification
- 5その他to afford a white solid
- 6workup.STIRRINGstirred at room temperature for 4 hours before concentration in vacuo and purification
- 7その他to afford a residue that
- 8その他was triturated in dichloromethane (5 mL)
実験手順
3-cyano-N-(1,2,4-thiadiazol-5-yl)-4-[2-iodo-4-(trifluoromethoxy)phenoxy]benzenesulfonamide (Preparation 760, 500 mg, 0.88 mmol), 1-(ethoxymethyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (Preparation 337, 600 mg, 1.4 mmol), palladium (0) tetrakis triphenylphosphine (78 mg, 0.067 mmol) and sodium carbonate (420 mg, 3.963 mmol) were dissolved in a mixture of water (4 mL) and 1,4-dioxane (12 mL) and heated to 85° C. under N2 for 7 hours. Further 1-(ethoxymethyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (100 mg 0.23 mmol) and palladium (0) tetrakis triphenylphosphine (10 mg, 0.008 mmol) were added and the reaction stirred at 85° C. under N2 for 18 hours. The reaction was quenched by the addition of ethyl acetate (20 mL) and saturated aqueous brine solution (20 mL). The organic layer was collected, dried over sodium sulphate and concentrated in vacuo before purification using silica gel column chromatography (v/v/v dichloromethane:methanol:acetic acid v/v/v 100:0:0 to 95:5:0.5) to afford a white solid. This was dissolved in 4M HCl in 1,4-dioxane (5 mL) and stirred at room temperature for 4 hours before concentration in vacuo and purification using silica gel column chromatography (v/v/v dichloromethane:methanol:acetic acid 100:0:0 to 90:10:1 to afford a residue that was triturated in dichloromethane (5 mL) to afford 210 mg of the title compound as a white solid as the HCl salt.