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US 5,082,945 AGranted
Process for the preparation of perhaloalkylthioethers
AssigneeRhone-Poulenc Agrochimie
InventorsClaude Wakselman, Marc Tordeux, Bernard Langlois, Jean-Louis Clavel, Roland Nantermet
Life of this patent
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Abstract
The present invention relates to a process for the preparation of perhaloalkylthioethers by bringing a perhaloalkyl halide, preferably a bromide or an iodide, into contact with a disulphide in the presence of zinc and of sulphur dioxide or of a dithionite or of a hydroxymethanesulphinate or of a formate anion and sulphur dioxide.
Claims16
A process for the preparation of perhaloalkylthioethers which comprises bringing into contact, optionally in a solvent:
- (1) a reducing agent comprising a metal selected from the group consisting of zinc, cadmium, aluminium and manganese, with sulphur dioxide,
- (2) a disulphide, and
- (3) a perfluoroalkyl halide.
Dependencies are inferred from the claim text.