[Cl:1][C:2]1[CH:3]=[C:4]([CH:15]=[CH:16][C:17]=1[Cl:18])[CH2:5][C:6]1[CH:14]=[CH:13][C:9]([C:10](O)=[O:11])=[CH:8][CH:7]=1.[CH3:19][S:20]([NH2:23])(=[O:22])=[O:21].Cl.CN(C)CCCN=C=NCC>ClCCl.CN(C)C1C=CN=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]([CH:15]=[CH:16][C:17]=1[Cl:18])[CH2:5][C:6]1[CH:14]=[CH:13][C:9]([C:10]([NH:23][S:20]([CH3:19])(=[O:22])=[O:21])=[O:11])=[CH:8][CH:7]=1
To a solution of 4-(3,4-dichlorobenzyl)benzoic acid (Preparation 148,150 mg, 0.54 mmol) in dichloromethane (25 mL) was added methanesulphonamide (153 mg, 1.61 mmol), 4-dimethylaminopyridine (196 mg, 1.61 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (307 mg, 1.61 mmol) and the mixture was stirred at room temperature for 5 hours. The mixture was diluted with dichloromethane, washed with water and 1M hydrochloric acid solution, dried over Na2SO4 and the solvent evaporated in vacuo. The crude product was purified by silica gel column chromatography eluting with 95:5 dichloromethane:methanol to afford the title compound (102 mg, 53%).
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