反应详情

To the product from Example 146B (0.042 g, 0.056 mmol) was added tetrabutyl ammonium fluoride solution in tetrahydrofuran (0.28 mL, 1N) and the mixture was stirred at room temperature for 18 hours. The tetrahydrofuran was evaporated and the mixture was partitioned between ethyl acetate and water. The organic was washed with brine, dried over MgSO4, filtered and evaporated. The residue was dissolved in dichloromethane (0.40 mL) and trifluoroacetic acid (0.20 mL) was added and the mixture was stirred at room temperature for 30 minutes. The solvent was evaporated and the residue was partitioned between chloroform and dilute NaHCO3, and brine, dried over MgSO4, filtered and concentrated to give the title compound (0.035 g), which was used without further purification.

1. customThe tetrahydrofuran was evaporated
2. customthe mixture was partitioned between ethyl acetate and water
3. washThe organic was washed with brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. customevaporated
7. dissolutionThe residue was dissolved in dichloromethane (0.40 mL)
8. additiontrifluoroacetic acid (0.20 mL) was added
9. stirringthe mixture was stirred at room temperature for 30 minutes
10. customThe solvent was evaporated
11. customthe residue was partitioned between chloroform and dilute NaHCO3, and brine
12. dry with materialdried over MgSO4
13. filtrationfiltered
14. concentrationconcentrated