反应详情

To a solution of Example 16B (0.760 g, 1.289 mmol) in tetrahydrofuran (12 mL) was added 1 M tetrabutylammonium fluoride in tetrahydrofuran (3.22 mL, 3.22 mmol) in a fast drip, and the resulting yellow solution was stirred at room temperature for 1 hour. The reaction mixture was partitioned between ethyl acetate and water. The aqueous layer was further washed with ethyl acetate (2×). The combined organic extracts were washed with brine, dried over anhydrous MgSO4, filtered, and concentrated in vacuo to a clear oil that crystallized upon standing. Trituration with 1:2 v/v dichloromethane/hexane afforded the title compound as a white powder (0.588 g, 92%). MS (ESI+) m/z 476 (M+H)+, (ESI−) m/z 474 (M−H)−.

1. customThe reaction mixture was partitioned between ethyl acetate and water
2. washThe aqueous layer was further washed with ethyl acetate (2×)
3. washThe combined organic extracts were washed with brine
4. dry with materialdried over anhydrous MgSO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo to a clear oil that
7. customcrystallized