Sodium Hydroxide → 1-ethyl-2-(6-trifluoromethoxybenzothiazol-2-ylamino)-1H-benzoimidazole-5-carboxylic acid
Reaction equation
C[O:2][C:3]([C:5]1[CH:30]=[CH:29][C:8]2[N:9]([CH2:27][CH3:28])[C:10]([NH:12][C:13]3[S:14][C:15]4[CH:21]=[C:20]([O:22][C:23]([F:26])([F:25])[F:24])[CH:19]=[CH:18][C:16]=4[N:17]=3)=[N:11][C:7]=2[CH:6]=1)=[O:4].[OH-].[Na+]>>[CH2:27]([N:9]1[C:8]2[CH:29]=[CH:30][C:5]([C:3]([OH:4])=[O:2])=[CH:6][C:7]=2[N:11]=[C:10]1[NH:12][C:13]1[S:14][C:15]2[CH:21]=[C:20]([O:22][C:23]([F:26])([F:25])[F:24])[CH:19]=[CH:18][C:16]=2[N:17]=1)[CH3:28]Participants
3
Procedure
1-Ethyl-2-(6-trifluoromethoxy-benzothiazol-2-ylamino)-1H-benzoimidazole-5-carboxylic acid (2.1 g) was prepared by following General Procedure E starting from 1-ethyl-2-(6-trifluoromethoxy-benzothiazol-2-ylamino)-1H-benzoimidazole-5-carboxylic acid methyl ester (3.5 g) and sodium hydroxide (2.0 N solution, 8.0 mL). LCMS: m/z 424; and 1H NMR (DMSO-d6, 400 MHz): δ 8.17 (1H, m), 7.96 (1H, m), 7.75 (1H, m), 7.88-7.85 (1H, m), 7.65-7.63 (1H, m), 7.59-7.57 (1H, m), 7.40-7.37 (1H, m), 4.26-4.25 (2H, q), 1.35-1.32 (3H, t) —COOH proton signal was not observed.