Process for the preparation of benzyl trifluoromethyl sulfide
AssigneeRhone-Poulenc Chimie
InventorsCatherine Francese, Marc Tordeux, Claude Wakselman
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Abstract
A process for the preparation of a benzyl trifluoromethyl sulfide by bringing a benzyl thiocyanate and trifluoromethyl bromide into contact with zinc in a polar aprotic solvent or a pyridine. The invention also relates to a process for the preparation of trifluoromethane sulfonyl chloride by bringing a benzyl trifluoromethyl sulfide into contact with chlorine and water.
Claims12
A process for the preparation of a benzyl trifluoromethyl sulfide comprising contacting a benzyl thiocyanate and trifluoromethyl bromide with zinc in a solvent selected from the group consisting of a polar aprotic solvent, substituted pyridine and pyridine for a time sufficient to form said benzyl trifluoromethyl sulfide.
A process for the preparation of trifluoromethane sulfonyl chloride comprising:
- (1) contacting a benzyl thiocyanate and trifluoromethyl bromide with zinc in a solvent selected from the group consisting of a polar aprotic solvent, substituted pyridine and pyridine for a time sufficient to form a benzyl trifluoromethyl sulfide, and
- (2) contacting the benzyl trifluoromethyl sulfide resulting from stage (1) with chlorine in water for a time sufficient to form trifluoromethane sulfonyl chloride.
Dependencies are inferred from the claim text.