PROCESS FOR PREPARING 4-TRIFLUOROMETHYLSULPHINYLPYRAZOLE DERIVATIVES

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 mixtur...

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Bibliographic Details
Main Authors PELTA, ISABELLE, CHARREAU, PHILIPPE, CLAVEL, JEAN-LOUIS, LE BARS, SYLVIE
Format Patent
LanguageEnglish
Published 28.11.2013
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
MEASURING
METALLURGY
ORGANIC CHEMISTRY
PHYSICS
TESTING
WEIGHING
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Summary: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 S2Cl2 to a solution, in an organic solvent, of the corresponding 4-unsubstituted pyrazole.
Bibliography:Application Number: HUP0203206