Patent · US Active

Process for the regioselective preparation of 1-alkyl-3-haloalkylpyrazole-4-carboxylic acid derivatives

US8350053B2 · kind B2 · utility

6Cited by

2References

5Claims

0Family size

Assignee

BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

Sergii Pazenok · Solingen, DE
Norbert Lui · Odenthal, DE
Arnd Neeff · Ennepetal, DE

Key dates

Filing date	Feb 26, 2009
Grant date	Jan 8, 2013
Priority date	—
Expiry date	Feb 26, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D231/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for the regioselective synthesis of 1-alkyl-3-halo-alkylpyrazole-4-carboxylic acid derivatives by cyclization of 2,3-disubstituted acrylic acid derivatives with hydrazines in the presence of carbonyl compounds.

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