Process for preparing 4-trifluoromethylsulfinylpyrazole...

Details Process for preparing 4-trifluoromethylsulfinylpyrazole... Process for preparing 4-trifluoromethylsulfinylpyrazole...

2005-04-19

2005-04-19

Shameem, Golam M M (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S367400

Reexamination Certificate

active

06881848

ABSTRACT:
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 S2Cl2to a solution, in an organic solvent, of the corresponding 4-unsubstituted pyrazole.

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Jean-Louis Clavel et al,J. Chem. Soc. Perkin 1, pp. 3371-3375 (1992), published by Chemical Society, London, England.

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