1,1-dimethylethyl(1RS,2SR)-2-(6-fluoropyridin-3-yl)-2-hydroxy-1-((3-(1,1,2,2-tetrafluoroethoxy)phenyl)methyl)ethylcarbamate → (1RS,2SR)-2-amino-1-(6-fluoropyridin-3-yl)-3-(3-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-propanol

Participants

Reaction Steps

To a solution of 1,1-dimethylethyl(1RS,2SR)-2-(6-fluoropyridin-3-yl)-2-hydroxy-1-((3-(1,1,2,2-tetrafluoroethoxy)phenyl)methyl)ethylcarbamate (1.0 g, 2.16 mmol) was added trifluoroacetic acid (10 ml), and the mixture was stirred at room temperature for 10 min. The reaction solution was concentrated under reduced pressure and 1N aqueous sodium hydroxide solution (10 ml) was added. The mixture was extracted with ethyl acetate (20 ml×2). The extract was washed with saturated brine, dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to give (1RS,2SR)-2-amino-1-(6-fluoropyridin-3-yl)-3-(3-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-propanol (750 mg, 96%).

Provenance & Evidence