反应详情

To Intermediate 87 (6.65 g) in a 250 mL round-bottom flask under nitrogen in Methanol (20 mL) and Dichloromethane (DCM) (20 mL) was added sodium borohydride (1.276 g) in three portions (effervescence) and the mixture stirred at room temperature under nitrogen for 16 h. The solvent was removed under vacuum and the residue was partitioned between ethyl acetate and water. The aqueous layer extracted well with ethyl acetate. The combined organics were dried (hydrophobic frit), filtered and evaporated to give the title compound 6.6 g as a white solid. LC/MS MH+397, Rt 2.61 min (5 min run).

1. customThe solvent was removed under vacuum
2. customthe residue was partitioned between ethyl acetate and water
3. extractionThe aqueous layer extracted well with ethyl acetate
4. customThe combined organics were dried (hydrophobic frit)
5. filtrationfiltered
6. customevaporated