Patent · US Active

Process for the preparation of 1-alkyl and 1-aryl-5-pyrazolecarboxylic acid derivatives

US8586753B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

Sergii Pazenok · Solingen, DE
Norbert Lui · Odenthal, DE
Igor Gerus · Horlivka, UA

Key dates

Filing date	Dec 15, 2010
Grant date	Nov 19, 2013
Priority date	—
Expiry date	Apr 28, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D317/30
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of 1-alkyl- or 1-aryl-substituted 5-pyrazolecarboxylic acid derivatives comprising the reaction of substituted 1,3-dioxolanes and 1,4-dioxanes with alkyl- or arylhydrazines to give 1-alkyl- or 1-aryl-substituted dihydro-1H-pyrazoles, and their further reaction to give 1-alkyl- or 1-aryl-substituted 5-pyrazolecarboxylic acid derivatives, which can be used as valuable intermediates for producing insecticidally effective anthranilamides.

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