Trifluoroacetic acid → (1RS,2SR)-2-amino-1-(3-chlorophenyl)-3-[4-(2,2,3,3,3-pentafluoropropyl)phenyl]-1-propanol
反応式
[Cl:1][C:2]1[CH:3]=[C:4]([CH:8]([OH:33])[CH:9]([NH:25]C(=O)OC(C)(C)C)[CH2:10][C:11]2[CH:16]=[CH:15][C:14]([CH2:17][C:18]([F:24])([F:23])[C:19]([F:22])([F:21])[F:20])=[CH:13][CH:12]=2)[CH:5]=[CH:6][CH:7]=1.FC(F)(F)C(O)=O>C(Cl)(Cl)Cl>[NH2:25][CH:9]([CH2:10][C:11]1[CH:16]=[CH:15][C:14]([CH2:17][C:18]([F:24])([F:23])[C:19]([F:20])([F:21])[F:22])=[CH:13][CH:12]=1)[CH:8]([C:4]1[CH:5]=[CH:6][CH:7]=[C:2]([Cl:1])[CH:3]=1)[OH:33]参加物
4
実験手順
To a solution of tert-butyl (1RS,2SR)-2-(3-chlorophenyl)-2-hydroxy-1-[4-(2,2,3,3,3-pentafluoropropyl)benzyl]ethylcarbamate (2.00 g, 4.05 mmol) in chloroform (20 ml) was added trifluoroacetic acid (20 ml), and the mixture was stirred at room temperature for 1 hr. The mixture was concentrated under reduced pressure. To the residue was added water, and the mixture was basified with saturated aqueous sodium hydrogen carbonate. The aqueous layer was extracted with ethyl acetate, dried over anhydrous magnesium sulfate, filtered and concentrated under the reduced pressure. The residue was recrystallized from (hexane-ethyl acetate) to give (1RS,2SR)-2-amino-1-(3-chlorophenyl)-3-[4-(2,2,3,3,3-pentafluoropropyl)phenyl]-1-propanol (1.08 g, 68%) as colorless crystals.