反应详情

Step 2B [Intermediate 5, G9591-162]: To 4-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzyloxy]-2,8-bis-trifluoromethyl-quinoline (1.5 g, 3.0 mmol, 1 equiv.) in 45 mL of ethylene glycol dimethyl ether was added 2-(4-Bromo-benzenesulfonylamino)-3-methyl-butyric acid methyl ester (1.06 g, 3.0 mmol, 1.0 equiv.) and Pd(PPh3)4 (174 mg, 0.15 mmol, 0.05 equiv.) under N2. The reaction mixture was stirred for 0.5 hr, then an aqueous solution of K2CO3 (834 mg, 6.0 mmol, 2 equiv.) was added. The mixture was heat to reflux overnight. After cooling to room temperature, solvent was removed under vacuum. The residue was diluted with EtOAc (100 mL) and washed with brine solution. The organic layer was dried over anhydrous MgSO4, solvent evaporated under vacuum, and the crude product was purified on silica gel column (30% EtOAc/Hexane) to give 1.026 g of 2-[4′-(2,8-Bis-trifluoromethyl-quinolin-4-yloxymethyl)-biphenyl-4-sulfonylamino]-3-methyl-butyric acid methyl ester in 53% yield.

1. temperatureThe mixture was heat
2. temperatureto reflux overnight
3. customsolvent was removed under vacuum
4. additionThe residue was diluted with EtOAc (100 mL)
5. washwashed with brine solution
6. dry with materialThe organic layer was dried over anhydrous MgSO4, solvent
7. customevaporated under vacuum
8. customthe crude product was purified on silica gel column (30% EtOAc/Hexane)