反应详情

温度

45 °C

Potassium hydroxide (131 mg, 2.34 mmol) was added in one portion to ethyl 3-(2-(4′-(6-carbamoyl-3,5-dimethylpyrazin-2-yl)-2-chlorobiphenyl-4-yl)acetamido)propanoate (Intermediate 16-1; 386.5 mg, 0.78 mmol) in t-BuOH (5038 μL) at RT. The resulting solution was stirred at 45° C. for 5 hours a precipitate formed. The reaction mixture was quenched with 2M HCl (5 mL), The reaction mixture was evaporated to dryness and redissolved in water (10 mL), and filtered through nylon, washed with water and dried under vacuum. The crude product was purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 50 mm diameter, 150 mm length), using decreasingly polar mixtures of water (containing 0.1% formic acid) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford 3-(2-(4′-(6-carbamoyl-3,5-dimethylpyrazin-2-yl)-2-chlorobiphenyl-4-yl)acetamido)propanoic acid (56.4 mg, 15.47%) as a white solid.

1. customformed
2. customThe reaction mixture was quenched with 2M HCl (5 mL)
3. customThe reaction mixture was evaporated to dryness
4. dissolutionredissolved in water (10 mL)
5. filtrationfiltered through nylon
6. washwashed with water
7. customdried under vacuum
8. customThe crude product was purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 50 mm diameter, 150 mm length)
9. additionFractions containing the desired compound
10. customwere evaporated to dryness