| abstract |
A process for the sulfinylation of a pyrazole derivative, characterized in that 5-amino-1 - [2,6-dichloro-4- (trifluoromethyl) phenyl] -1 H-pyrazol-3-carbonitrile (II) reacts with an agent Sulfinylation S in the presence of at least one acid amine complex, wherein the amine (s) is selected from cyclic secondary amines and the acid (s) is selected from derivatives of sulfonic acid and with the addition of a halogenating agent, wherein S is [CF3S (O)] 2O; or CF3S (O) X wherein X means fluoro, chloro, bromo, iodo, a hydroxy group, or an alkali metal or alkaline earth metal salt of the hydroxy group; or mixtures of these. |