反应详情

温度

25 °C

In a round bottom flask was placed 2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-5,5,5-trifluoro-pentanoic acid [1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl-methyl)-1H-pyrazol-3-yl]-amide (210 mg, 0.39 mmol), methanol (5 mL) and p-toluenesulfonic acid hydrate (17 mg). This mixture was stirred at 25° C. for 16 h and then diluted with dichloromethane and concentrated in vacuo with silica gel (2 g). Purification by Biotage flash chromatography (Aspire, 40 g column, 100% ethyl acetate to 5% methanol/ethyl acetate) afforded 2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-5,5,5-trifluoro-pentanoic acid [1-((R)-2,3-dihydroxy-propyl)-1H-pyrazol-3-yl]-amide (140 mg, 71%) as a white foam: HR-ES-MS m/z calculated for C21H21N4O5ClF3 [M+H]+ 503.1304, observed 503.1300; 1H NMR (300 MHz, DMSO-d6) δ ppm 1.88-2.46 (m, 4H), 3.20-3.33 (m, 2H), 3.68-3.82 (m, 1H), 3.86 (dd, J=13.4, 7.2 Hz, 1H), 4.09 (dd, J=13.4, 3.9 Hz, 1H), 4.32 (d, J=18.1 Hz, 1H), 4.53 (m, J=18.1 Hz, 1H), 4.72 (t, J=5.4 Hz, 1H), 4.78 (dd, J=9.1, 5.1 Hz, 1H), 4.83 (s, 1H), 4.94 (d, J=5.1 Hz, 1H), 6.42 (d, J=2.1 Hz, 1H), 7.33-7.40 (m, 1H), 7.42-7.57 (m, 3H), 7.66 (d, J=8.2 Hz, 1H), 10.75 (s, 1H).

1. customIn a round bottom flask was placed
2. concentrationconcentrated in vacuo with silica gel (2 g)
3. customPurification by Biotage flash chromatography (Aspire, 40 g column, 100% ethyl acetate to 5% methanol/ethyl acetate)