反应详情

Add to a stirring solution of 4-(3-Cyclopentyl-indole-1-sulfonyl)-benzoic acid methyl ester (2.0 g, 5.22 mmol) in THF (50 mL) and MeOH (25 mL), 5N NaOH (3 mL, 2.9 eq.). Stir the solution for 2 h at room temperature and the remove solvents to give a paste. Treat the paste with 1N HCl (25 mL) and a solid results. Dilute further with water (50 mL). Filter the solid, back-wash with water, and dry (20 mm Hg, 60° C.) to provide the pure title compound (1.63 g, 84%); 1H NMR (DMSO-d6) δ 8.06 (m, 4H), 7.93 (d, J=8.2 Hz, 1H), 7.63 (d, J=7.7 Hz, 1H), 7.53 (s, 1H), 7.37 (t, J=7.7 Hz, 1H), 7.28 (t, J=7.7 Hz, 1H), 3.17 (m, 1H), 2.08 (m, 2H), 1.69 (m, 6H); MS (ESI) m/z 368 (m−H).

1. customthe remove solvents to give a paste
2. customa solid results
3. filtrationFilter the solid
4. washback-wash with water
5. customdry (20 mm Hg, 60° C.)