[Cl:1][C:2]1[C:6]2[CH:7]=[CH:8][C:9]([O:11][CH2:12][C:13]3[CH:18]=[CH:17][C:16]([Cl:19])=[CH:15][C:14]=3[Cl:20])=[CH:10][C:5]=2[S:4][C:3]=1[C:21]([OH:23])=O.CC[N:26]=C=NCCCN(C)C.C(N(CC)CC)C>CN(C=O)C.C([O-])(O)=O.[Na+].O>[Cl:1][C:2]1[C:6]2[CH:7]=[CH:8][C:9]([O:11][CH2:12][C:13]3[CH:18]=[CH:17][C:16]([Cl:19])=[CH:15][C:14]=3[Cl:20])=[CH:10][C:5]=2[S:4][C:3]=1[C:21]([NH2:26])=[O:23]To a solution of 3-chloro-6-((2,4-dichlorobenzyl)oxy)-1-benzothiophene-2-carboxylic acid (190.4 mg) in DMF (dry) (4.9 mL) were added HOBt ammonia complex (112 mg), EDCI (141 mg) and triethylamine (0.205 mL). The mixture was stirred at room temperature overnight. The mixture was diluted with saturated aqueous NaHCO3 and water. The precipitate was collected by filtration, and washed with water and hexane to give the title compound (195 mg).
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