反应详情

To a solution of methyl 2-((3S,5R,6S)-1-((S)-1-((tert-butyldiphenylsilyl)oxy)butan-2-yl)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-2-oxopiperidin-3-yl)propanoate (285 mg, 0.398 mmol) (the less polar isomer from step D) in THF (1988 μL) was added TBAF (1.0M in THF) (1590 μL, 1.590 mmol). The mixture was stirred at room temperature for 16 h. The mixture was quenched with 1 M HCl and diluted with EtOAc. The organic layer was washed with sat. aq. NaCl solution, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel (11 g VersaPak I-style, Spherical, Supelco, Bellenfonte, Pa.; eluent: 50 to 75% MtBE in hexanes) to give the title compound.

1. customThe mixture was quenched with 1 M HCl
2. additiondiluted with EtOAc
3. washThe organic layer was washed with sat. aq. NaCl solution
4. dry with materialdried over Na2SO4
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by flash chromatography on silica gel (11 g VersaPak I-style, Spherical, Supelco, Bellenfonte, Pa.; eluent: 50 to 75% MtBE in hexanes)