反应详情

温度

-78 °C

To a solution of 3-((S)-2-cyclohexyl-6-oxo-piperidin-1-yl)-5-(3,3-dimethyl-but-1-ynyl)-thiophene-2-carboxylic acid methyl ester (200 mg, 0.5 mmol, 1.0 equiv) in THF (2.0 mL) was added LDA (2.0 M in THF, 0.3 mL, 0.6 mmol, 1.2 equiv) at −78° C. and the resulting solution was stirred at −78° C. for 10 minutes. To the solution was then added 3-iodo-propene (250 mg, 1.5 mmol, 3.0 equiv) and the reaction mixture was stirred at room temperature for 15 minutes. The reaction was quenched by addition of water. The mixture was extracted with EtOAc. The organic layer was washed with sat. NaHCO3 aq. solution and brine, dried over Na2SO4, and concentrated under vacuum. The residue was purified by silica gel column chromatography, Heptane/DCM (contained 3% EtOAc) to give 60 mg of less polar diastereomer and 100 mg of more polar diastereomer. MS: 442 [M+H+].

1. customThe reaction was quenched by addition of water
2. extractionThe mixture was extracted with EtOAc
3. washThe organic layer was washed with sat. NaHCO3 aq. solution and brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated under vacuum
6. customThe residue was purified by silica gel column chromatography, Heptane/DCM (contained 3% EtOAc)
7. customto give 60 mg of less polar diastereomer and 100 mg of more polar diastereomer