反应详情

To a solution of the title compound of Example 3 (1.7 g, 2.9 mmol) in 10.6 mL dry THF was added Ph3P (765 mg, 2.9 mmol) at room temperature. Water (78.3 μL, 4.35 mmol) was added drop wise and the reaction mixture was allowed to stir for 16 hours at room temperature. A 1:1 mixture of water/MeOtBu was added to quench the reaction. The two phases were separated. The aqueous phase was extracted by EtOAc twice, and then the combined organic phase was washed by brine, dried over sodium sulfate and concentrated under reduced pressure. The residue was chromatographed on silica gel, eluting with EtOAc, the 5% to 15% MeOH/methylene chloride to give the title compound as a white foam-like solid. 1H NMR (CDCl3): consistent with proposed structure.

1. additionwas added
2. customto quench
3. customthe reaction
4. customThe two phases were separated
5. extractionThe aqueous phase was extracted by EtOAc twice
6. washthe combined organic phase was washed by brine
7. dry with materialdried over sodium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe residue was chromatographed on silica gel
10. washeluting with EtOAc