反应详情

温度

25 °C

A solution of 3-cyclopentyl-2-[6-oxo-4-(4-trifluoromethyl-pyrimidin-2-yloxy)-6H-pyridazin-1-yl]-propionic acid methyl ester (0.2 g, 0.48 mmol) in dioxane (2 mL) was treated with a 6N aqueous sodium hydroxide solution (2 mL). The reaction was stirred at 25° C. for 2 d. At this point, ethyl acetate (20 mL) was added and then the aqueous phase was back extracted with ethyl acetate. The combined organics were dried over sodium sulfate, filtered, and concentrated in vacuo. Preparative HPLC afforded 3-cyclopentyl-2-[6-oxo-4-(4-trifluoromethyl-pyrimidin-2-yloxy)-6H-pyridazin-1-yl]-propionic acid as a light oil (20 mg, 10%); 1H NMR (300 MHz, DMSO-d6): δ 9.13 (d, 1H, J=4.8 Hz), 8.24 (d, 1H, J=2.4 Hz), 7.96 (d, 1H, J=4.8 Hz), 7.04 (d, 1H, J=2.4 Hz), 5.38 (dd, 1H, J1=4.5 Hz, J2=10.5 Hz), 2.25˜2.15 (m, 1H), 2.06˜1.97 (m, 1H), 1.71˜1.44 (m, 7H), 1.17˜1.04 (m, 3H). LC-MS: 399.1 [M+1]+, tR=3.04 min.

1. extractionthe aqueous phase was back extracted with ethyl acetate
2. dry with materialThe combined organics were dried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo