[Cl:1][C:2]1[CH:35]=[CH:34][CH:33]=[CH:32][C:3]=1[C:4]([C:6]1[CH:10]=[C:9]([CH2:11][CH3:12])[S:8][C:7]=1[N:13]1[C:17]([CH3:18])=[N:16][N:15]=[C:14]1[CH2:19][NH:20][C:21]([C:23]1[NH:24][C:25]2[C:30]([CH:31]=1)=[CH:29][CH:28]=[CH:27][CH:26]=2)=[O:22])=[O:5].[Br:36]Br>C(O)(=O)C>[Cl:1][C:2]1[CH:35]=[CH:34][CH:33]=[CH:32][C:3]=1[C:4]([C:6]1[CH:10]=[C:9]([CH2:11][CH3:12])[S:8][C:7]=1[N:13]1[C:17]([CH3:18])=[N:16][N:15]=[C:14]1[CH2:19][NH:20][C:21]([C:23]1[NH:24][C:25]2[C:30]([C:31]=1[Br:36])=[CH:29][CH:28]=[CH:27][CH:26]=2)=[O:22])=[O:5]N-(4-(3-(2-Chlorobenzoyl)-5-ethylthiophen-2-yl)-5-methyl[1,2,4]triazol-3-ylmethyl)indole-2-carboxamide (1.0 g, Example 14) was dissolved in acetic acid (12 ml). Bromine (0.1 ml) dissolved in acetic acid (1 ml) was dropwise added under water-cooling, and the mixture was stirred for 1 hour. The solvent was evaporated, and an aqueous sodium thiosulfate solution was added. The mixture was extracted with chloroform. The extract was washed with saturated brine, a saturated aqueous sodium hydrogencarbonate solution and saturated brine, and dried over magnesium sulfate. The solvent was evaporated, and the residue was recrystallized from methanol to give 0.36 g of N-(4-(3-(2-chlorobenzoyl)-5-ethylthiophen-2-yl)-5-methyl[1,2,4]triazol-3-ylmethyl)-3-bromoindole-2-carboxamide.
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