1,2-Dichloro-1-fluoroethane → 2-(2-Chloro-2-fluoroethylthio)-phenylsulfonamide

Beteiligte Stoffe

Reaktionsschritte

A mixture of 217.8 g of the 2-mercaptophenylsulfonamide triethylamine salt obtained in accordance with Example H6 and 101 g of 1,2-dichloro-1-fluoroethane in 950 ml of methanol is stirred for 24 hours at a temperature of +65° C. to +70° C. and is then stirred in an autoclave for a further 24 hours at +95° C. to +100° C. The reaction mixture is then evaporated and the residue is triturated with water. Extracting the mixture with ethyl acetate, washing the extract with water, drying it over sodium sulfate and evaporating it and purifying the residue by chromatography with methylene chloride gives 99.5 g (49.2% of theory) of 2-(2-chloro-2-fluoroethylthio)-phenylsulfonamide having a melting point of +88° C. to +89° C.

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