反应详情

To a solution of tert-butyl (2S,5S)-2-[9-(2-{(2S,5S)-1-[N-(methoxycarbonyl)-L-isoleucyl]-5-methylpyrrolidin-2-yl}-1H-imidazol-5-yl)-1,4,5,11-tetrahydroisochromeno[4′,3′:6,7]naphtho[1,2-d]imidazol-2-yl]-5-methylpyrrolidine-1-carboxylate (2.77 g, 3.5 mmol) in dichloromethane (25 mL) was added MnO2 (9.00 g, 103 mmol). The resulting slurry was stirred at room temperature for 20 h. The solution was diluted with dichloromethane, filtered through celite, and concentrated. The crude oil was purified by column chromatography (SiO2, 0-5-10% EtOAc/MeOH) to provide tert-butyl (2S,5S)-2-[9-(2-{(2S,5S)-1-[N-(methoxycarbonyl)-L-isoleucyl]-5-methylpyrrolidin-2-yl}-1H-imidazol-5-yl)-1,11-dihydroisochromeno[4′,3′:6,7]naphtho[1,2-d]imidazol-2-yl]-5-methylpyrrolidine-1-carboxylate (1.10 g, 40% over 2 steps) as a brown foam. LCMS-ESI+: calc'd for C44H53N7O6: 775.41 (M+). Found: 776.37 (M+H+)

1. filtrationfiltered through celite
2. concentrationconcentrated
3. customThe crude oil was purified by column chromatography (SiO2, 0-5-10% EtOAc/MeOH)