反应详情

To a solution of (4S,5S)-tert-butyl 5-((2,2-dimethylhexanamido)methyl)-4-((S)-2-(hydroxy(1-(3-methoxypropyl)-1H-indazol-6-yl)methyl)-3-methylbutyl)-2,2-dimethyloxazolidine-3-carboxylate (32 mg, 0.05 mmol) in Ac2O (6 mL) was added pyridine (0.5 mL) dropwise. The reaction mixture was stirred at rt overnight. Satd aq NH4Cl (10 mL) was added and the mixture was extracted with EtOAc (3×15 mL). The combined organic extracts were washed with brine, dried over Na2SO4 and evaporated. The residue was purified by column chromatography on silica gel to give (4S,5S)-tert-butyl 4-((S)-2-(acetoxy(1-(3-methoxypropyl)-1H-indazol-6-yl)methyl)-3-methylbutyl)-5-((2,2-dimethylhexanamido)methyl)-2,2-dimethyloxazolidine-3-carboxylate (25 mg, 73%). MS: 687 (M+1)

1. extractionthe mixture was extracted with EtOAc (3×15 mL)
2. washThe combined organic extracts were washed with brine
3. dry with materialdried over Na2SO4
4. customevaporated
5. customThe residue was purified by column chromatography on silica gel