Patent · US Active

Process for preparing pyrazoles

US10513498B2 · kind B2 · utility

0Cited by

4References

5Claims

0Family size

Assignee

BASF SE

Inventors

Birgit Gockel · Ludwigshafen, DE
Daniel Saelinger · Ludwigshafen, DE
Sebastian Soergel · Ludwigshafen, DE
Michael Rack · Eppelheim, DE

Key dates

Filing date	Mar 5, 2019
Grant date	Dec 24, 2019
Priority date	—
Expiry date	Mar 5, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D405/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing a pyrazole compound of formula V, which comprises cyclizing a hydrazone substituted α,β-unsaturated carbonyl compound of formula IV by reacting it with a suitable reagent, e.g. a reducing agent, an organometallic reagent or a nucleophilic reagent. The compounds of formula V are versatile reaction tools for the preparation of pyrazole derived fine chemicals. The present invention also relates to pyrazole compounds of formulae Va, Vb, Vc, and VI.

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