Trifluoroacetic acid → (3R)-6-Cyclohexyl-3-(3-{[methyl(2-pyridinylmethyl)amino]carbonyl}-1,2,4-oxadiazol-5-yl)hexanoic acid
반응식
[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:19]2[O:23][N:22]=[C:21]([C:24]([N:26]([CH3:34])[CH2:27][C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][N:29]=3)=[O:25])[N:20]=2)[CH2:11][C:12]([O:14]C(C)(C)C)=[O:13])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.FC(F)(F)C(O)=O>ClCCl>[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:19]2[O:23][N:22]=[C:21]([C:24]([N:26]([CH3:34])[CH2:27][C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][N:29]=3)=[O:25])[N:20]=2)[CH2:11][C:12]([OH:14])=[O:13])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1참가 물질
4
반응물 2
생성물 1
시약·촉매·용매 1
실험 절차
A solution of tert-butyl (3R)-6-cyclohexyl-3-(3-{[methyl(2-pyridinylmethyl)amino]carbonyl}-1,2,4-oxadiazol-5-yl)hexanoate (Preparation 35) (527 mg, 1.12 mmol) in dichloromethane (20 ml) was treated with trifluoroacetic acid (10 ml) and the resulting mixture was stirred at room temperature under a nitrogen atmosphere for 2 hours. The solvent was removed under reduced pressure and the residue was azeotroped from toluene. The residue was dissolved in a saturated aqueous solution of sodium hydrogen carbonate (3 ml) and the pH was adjusted to pH 4 with aqueous citric acid solution (10%w/v). The aqueous phase was extracted with ethyl acetate (×2) and the combined organic layers were washed with brine, dried over anhydrous sodium sulphate, filtered and the solvent removed under reduced pressure to afford the title compound as a yellow oil (456 mg)