Patent · US Active

Process for the preparation of 5-fluoro-1-alkyl-3-fluoroalky1-1H-pyrazole-4-carbonyl chlorides and fluorides

US8431718B2 · kind B2 · utility

2Cited by

1References

10Claims

0Family size

Assignee

BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

Sergii Pazenok · Solingen, DE
Norbert Lui · Odenthal, DE
Stephanie Gary · Champagne-au-Mont-d'Or, FR

Key dates

Filing date	Apr 22, 2011
Grant date	Apr 30, 2013
Priority date	—
Expiry date	Apr 22, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D231/16
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a novel process for the preparation of 5-fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl halides and the intermediates occurring in this process, ethyl 5-chloro-1-methyl-3-difluoromethyl-1H-pyrazole-4-carboxylate and ethyl 5-fluoro-1-methyl-3-difluoromethyl-1H-pyrazole-4-carboxylate.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.