反应详情

温度

50 °C

To a solution of 3-[(S)-6-cyclohexyl-3-(2-hydroxy-ethyl)-2-oxo-piperidin-1-yl]-5-(3,3-dimethyl-but-1-ynyl)-thiophene-2-carboxylic acid methyl ester (123 mg, 0.28 mmol, 1 equiv.) in THF/H2O/MeOH (1.0 mL/1.0 mL/0.5 mL) was added LiOH.H2O (60 mg, 1.38 mmol, 5 equiv) and the resulting solution was stirred at 50° C. for 20 minutes. The solution was then acidified to pH=5 by addition of 3.0 N HCl aq. solution. The solution was extracted with EtOAc. The organic layer was dried over Na2SO4, and concentrated. The residue was purified by prep-HPLC (XBridge Prep C 18 5 um, 30×50 mm) in basic condition (0.1% NH4OH, 10%˜45% CH3CN/H2O, 10 min run, 40 ml/min) to give product 28 mg (yield 23%). MS: 432 [M+H+]. 1H-NMR (400 MHZ, CD3OD): 6.85 (s, 1H), 3.92 (br, 1H), 3.67 (m, 2H), 2.41 (br, 1H), 2.15 (m, 1H), 1.97 (m, 2H), 1.78 (m, 7H), 1.37 (m, 2H), 1.31 (s, 9H), 1.14 (m, 5H).

1. extractionThe solution was extracted with EtOAc
2. dry with materialThe organic layer was dried over Na2SO4
3. concentrationconcentrated
4. customThe residue was purified by prep-HPLC (XBridge Prep C 18 5 um, 30×50 mm) in basic condition (0.1% NH4OH, 10%˜45% CH3CN/H2O, 10 min run, 40 ml/min)