反应详情

To a solution of 6-cyano-2-ethyl-1-(4-{2-[({[(4-methylphenyl)sulfonyl]amino}carbonyl)amino]ethyl}phenyl)-1H-benzimidazole (Example 85, 162 mg, 0.33 mmol) in 2-methyl-2-propanol (10 mL) was added powdered KOH (66 mg, 1.0 mmol). The resulting mixture was heated at reflux temperature for 3 h. After removal of solvent, the reaction mixture was partitioned between dichloromethane (50 mL) and phosphate buffer (50 mL). The organic phase was separated and the aqueous phase was extracted with dichloromethane (50 mL). The combined organic phases were washed with brine (50 mL), dried (Na2SO4), and concentrated. The residual solids were recrystallized from ethyl acetate to afford 105 mg (63%) of the title compound as white solids: 1H-NMR (CDCl3) δ: 7.79 (2H, d, J=8.4 Hz), 7.75 (1H, d, J=8.8 Hz), 7.71–7.63 (2H, m), 7.35–7.25 (4H, m), 7.16 (2H, d, J=8.4 Hz), 6.75 (2H, br.s), 6.55 (1H, br.s), 3.54 (2H, t, J=6.4 Hz), 2.88 (2H, t, J=6.4 Hz), 2.79 (2H, q, J=7.5 Hz), 2.40 (3H, s), 1.34 (3H, t, J=7.5 Hz).

1. temperatureThe resulting mixture was heated
2. temperatureat reflux temperature for 3 h
3. customAfter removal of solvent
4. customthe reaction mixture was partitioned between dichloromethane (50 mL) and phosphate buffer (50 mL)
5. customThe organic phase was separated
6. extractionthe aqueous phase was extracted with dichloromethane (50 mL)
7. washThe combined organic phases were washed with brine (50 mL)
8. dry with materialdried (Na2SO4)
9. concentrationconcentrated
10. customThe residual solids were recrystallized from ethyl acetate