2-Bromo-1,1-difluoroethane → 2-(2,2-Difluoroethylthio)-phenylsulfonamide

Beteiligte Stoffe

Reaktionsschritte

A mixture of 145.2 g of the 2-mercaptophenylsulfonamide triethylamine salt obtained in accordance with Example H6 and 79.7 g of 2-bromo-1,1-difluoroethane in 600 ml of methanol is stirred for 16 hours at a temperature of +55° C. to +60° C. The reaction mixture is then evaporated. Triturating the residue with ice water and filtering the suspension thus obtained gives 120 g (95% of theory) of 2-(2,2-difluoroethylthio)-phenylsulfonamide having a melting point of +111° C. to +112° C.

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