Process for preparing 4-trifluoromethylsulpinylpyrazole derivatives

摘要

A process for the preparation of a disulphide of formula (III), the process comprising adding sulphur monochloride (S2Cl2) to a solution, in a organic solvent, of a compound of formula (IV), wherein: W represents nitrogen or -CR3, R1 represents halogen, haloalkoxy, R4S(O)n- or -SF5, and R2 represents hydrogen or halogen.