Bayer Cropscience Ag

Yuriy Grigoverievich Shermolovich

Norbert Lui

Sergii Pazenok

Elena Ivanovna Kaminskaya

Vadim Mikhailovich Timoshenko

A new process for the preparation of 5-fluoro-1H-pyrazoles of the general formula (I) is described, resulting from the reaction of an olefin of the general formula (II) with hydrazines of the formula (III)R&#x2014;NH&#x2014;NH&#x2003;&#x2003;(III),whereinRis selected from C-Calkyl, C-Caryl;Ris a trihalomethyl moiety with at least one fluorine atom; andRis selected from C-Chaloalkyl, CF, CF, CF, CFCFCl, CFClCF,in the presence of water and a base.

Growing community of inventors

Kyiv, Ukraine

Yuriy Grigoverievich Shermolovich