反应详情

温度

-78 °C

To a cold (-78° C.) solution of 2-((3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxopiperidin-1-yl)-N-(1-hydroxy-2-methylpropan-2-yl)butanamide (89 mg, 0.167 mmol; Example 179, Step A: epimeric mixture) in DCM (1674 μL) was added 3 eq. of diethylaminosulfur trifluoride (26.5 μL, 0.201 mmol) dropwise. The reaction mixture was stirred at −78° C. for 20 min. Anhydrous K2CO3 (1.5 equiv) was then added in one portion and the mixture was allowed to warm to ambient temperature. The reaction was poured into saturated aqueous NaHCO3, and the biphasic mixture was extracted with EtOAc×2. The combined organic extracts were dried over MgSO4, filtered, and the filtrate was concentrated under reduced pressure. Purification of the residue by flash chromatography on silica gel (eluent: 0 to 20% ethyl acetate/hexane) provided the title compound.

1. temperatureto warm to ambient temperature
2. extractionthe biphasic mixture was extracted with EtOAc×2
3. dry with materialThe combined organic extracts were dried over MgSO4
4. filtrationfiltered
5. concentrationthe filtrate was concentrated under reduced pressure
6. customPurification of the residue by flash chromatography on silica gel (eluent: 0 to 20% ethyl acetate/hexane)