Bayer Cropscience S.a.

Rhone-Poulenc Agro

Basf Agro B.v., Arnhem (Nl), Wadenswil-Branch

Jean-Louis Clavel

Isabelle Pelta

Philippe Charreau

Sylvie Le Bars

David William Hawkins

David Alan Roberts

John Harry Wilkinson

A process for the preparation of a compound of formula (I)comprising oxidizing a compound of formula (II)with trifluoroperacetic acid in the presence of a corrosion inhibiting compound such as boric acid. Also, a process for preparing a compound of formula (II) by adding sulfur dioxide to a mixture of the corresponding disulfide, a formate salt, trifluoromethyl bromide and a polar solvent; and a process for preparing the disulfide comprising adding SClto a solution, in an organic solvent, of the corresponding 4-unsubstituted pyrazole.

Process for preparing 4-trifluoromethylsulfinylpyrazole derivative

Processes for preparing pesticidal intermediates

Growing community of inventors

Ampuis, France

Jean-Louis Clavel