Patent · US Active

Method for the regioselective synthesis of 1-alky1-3-haloalkyl-pyrazole-4-carboxylic acid derivatives

US8629288B2 · kind B2 · utility

5Cited by

4References

11Claims

0Family size

Assignee

Bayer Intellectual Property GmbH · DE

Inventors

Sergii Pazenok · Solingen, DE
Norbert Lui · Odenthal, DE
Jens-Dietmar Heinrich · Burscheid, DE
Thomas Wollner

Key dates

Filing date	Feb 12, 2009
Grant date	Jan 14, 2014
Priority date	—
Expiry date	Feb 12, 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, and to the hydrazones formed as intermediates in the process.

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