[C:1]1([NH:7][S:8]([CH3:11])(=[O:10])=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[Cl:12][CH2:13][C:14](Cl)=[O:15].[Cl-].[Al+3].[Cl-].[Cl-].Cl>C(Cl)Cl>[Cl:12][CH2:13][C:14]([C:4]1[CH:3]=[CH:2][C:1]([NH:7][S:8]([CH3:11])(=[O:10])=[O:9])=[CH:6][CH:5]=1)=[O:15]In a flask containing 128.4 g (0.75 mole) of N-phenylmethanesulfonamide, 169.5 g (1.50 mole) of chloroacetyl chloride in 1 L of methylene chloride under an atmosphere of nitrogen and cooled to about -10° C. add 300 g (2.25 mole) of aluminum chloride. Stir the resulting mixture for about 2 hours at -10° C. then warm to room temperature for about 16 hours. Pour the reaction mixture onto 2 Kg of ice containing 600 mL of concentrated hydrochloric acid. Collect the precipitate and wash with methanol (3×300 mL) and dry in vacuo to give the title compound.
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