ClS([C:5]1[C:6]([Cl:15])=[C:7]([C:11]([Cl:14])=[CH:12][CH:13]=1)[C:8]([OH:10])=[O:9])(=O)=O.C([O-])([O-])=O.[K+].[K+].C(N)CCC>C1(C)C=CC=CC=1.Cl>[Cl:14][C:11]1[CH:12]=[CH:13][CH:5]=[C:6]([Cl:15])[C:7]=1[C:8]([OH:10])=[O:9]Part B: 3-(Chlorosulfonyl)-2,6-dichlorobenzoic acid (1.5 g; 5.2 mmol) was dissolved in anhydrous toluene (35 ml) to which was added powdered K2CO3 (1.44 g: 10.4 mmol) and n-butylamine (1.0 ml, 10.4 mmol). The reaction mixture was stirred at 25° C. for 12 hours. The solution was diluted slowly with 1 M ethereal HCl (20 ml) and was then stirred for 30 minutes. The solution was filtered and the resulting filtrate was evaporated to dryness to give crude product. Further purification of the material by silica gel chromatography using EtOAc as the eluent provided 3-N-butylsulfonamidoyl)-2,6-dichlorobenzoic acid (Formula 3) (1.43 g, 85%. 1H NMR (DMSO) d 8.11 (t, 1H), 7.98 and 7.71 (doublets, 1H each), 2.75 (m, 2H), 1.55 (m, 2H), 1.32 (m 2H), 0.87 (t, 3H)
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