反应详情

A solution of (S)-2-[4-(3-ethoxy-2-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [5-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl)-pyrazin-2-yl]-amide (prepared in Example 150, 0.300 g, 0.57 mmol) in tetrahydrofuran (20 mL) was treated with 1N aqueous hydrochloric acid (10 mL). The reaction mixture was stirred for 20 h at room temperature. The reaction mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate, a saturated sodium chloride solution and dried over magnesium sulfate. The solvents were evaporated and the residue was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 40 g; 10% to 100% (9:1 dichloromethane:methanol)/hexanes) to afford (S)-2-[4-(3-ethoxy-2-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [5-((S)-1,2-dihydroxy-ethyl)-pyrazin-2-yl]-amide (0.188 g, 68%) as a fluffy white solid: HR-ES-MS m/z calculated for C24H29FN4O6, [M+H]+ 489.2144 observed 489.2143; 1H NMR (300 MHz, DMSO-d6) δ ppm 0.92 (d, J=6.9 Hz, 3H), 0.95 (d, J=6.9 Hz, 3H), 1.36 (t, J=6.9 Hz, 3H), 1.42-1.57 (m, 1H), 1.57-1.73 (m, 1H), 1.74-1.90 (m, 1H), 3.47-3.61 (m, 1H), 3.68 (dt, J=10.8, 5.3 Hz, 1H), 4.15 (q, J=6.9 Hz, 2H), 4.26 (d, J=18.4 Hz, 1H), 4.53-4.68 (m, 2H), 4.73 (t, J=5.7 Hz, 1H), 4.92 (s, 1H), 5.03 (dd, J=10.6, 4.2 Hz, 1H), 5.55 (d, J=4.8 Hz, 1H), 6.98-7.08 (m, 1H), 7.08-7.25 (m, 2H), 8.45 (s, 1H), 9.17 (s, 1H), 11.15 (s, 1H).

1. washwashed with saturated sodium bicarbonate
2. dry with materiala saturated sodium chloride solution and dried over magnesium sulfate
3. customThe solvents were evaporated
4. customthe residue was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 40 g; 10% to 100% (9:1 dichloromethane:methanol)/hexanes)