Trifluoroacetic acid → 5-Chloro-6-[(1-methylethyl)oxy]-1-(4-piperidinyl)-1,3-dihydro-2H-benzimidazol-2-one
反応式
[Cl:1][C:2]1[C:24]([O:25][CH:26]([CH3:28])[CH3:27])=[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>[Cl:1][C:2]1[C:24]([O:25][CH:26]([CH3:28])[CH3:27])=[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
反応物 2
生成物 1
試薬・触媒・溶媒 1
実験手順
A solution of 1,1-dimethylethyl 4-{5-chloro-6-[(1-methylethyl)oxy]-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl}-1-piperidinecarboxylate (D86, 140 mg, 0.34 mmol) in dichloromethane (3 ml) was treated with trifluoroacetic acid (3 ml) and stirred at room temperature under argon for 1 hr. The mixture was concentrated under vacuum and the residue treated with 10% Na2CO3 solution and extracted with ethyl acetate (×3). The combined extract was dried (MgSO4) and concentrated under vacuum to leave the title compound as a red oil (94 mg, 83%). M++H=310.0.