Trifluoroacetic acid → 5-Fluoro-6-methyl-1-(4-piperidinyl)-1,3-dihydro-2H-benzimidazol-2-one
反応式
[F:1][C:2]1[C:24]([CH3:25])=[CH:23][C:5]2[N:6]([CH:10]3[CH2:15][CH2:14][N:13](C(OC(C)(C)C)=O)[CH2:12][CH2:11]3)[C:7](=[O:9])[NH:8][C:4]=2[CH:3]=1.FC(F)(F)C(O)=O>ClCCl>[F:1][C:2]1[C:24]([CH3:25])=[CH:23][C:5]2[N:6]([CH:10]3[CH2:11][CH2:12][NH:13][CH2:14][CH2:15]3)[C:7](=[O:9])[NH:8][C:4]=2[CH:3]=1参加物
4
実験手順
1,1-Dimethylethyl 4-(5-fluoro-6-methyl-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)-1-piperidine-carboxylate (D29) (0.68 mmol, 239 mg) in dichloromethane (5 mL) was treated under argon at room temperature with trifluoroacetic acid (1 mL) and allowed to stir for 1 h. The mixture was concentrated, treated with 10% Na2CO3 aqueous solution, extracted 3 times with ethyl acetate. Organics were combined, dried on MgSO4, and concentrated under vacuum to give the title compound (0.64 mmol, 160 mg, 94% yield). M+H=250.2.