Patent · US Active

Process for purification of pyrazolpyridazines

US10961226B2 · kind B2 · utility

0Cited by

0References

9Claims

0Family size

Assignee

BASF SE

Inventors

Eric George Klauber · Bad Dürkheim, DE
Birgit Gockel · Ludwigshafen, DE
Sebastian Soergel · Ludwigshafen, DE
Roland Goetz · Ludwigshafen, DE
Henricus Maria Martinus Bastiaans · Raleigh, US
Jochen Dietz · Karlsruhe, DE
Joachim Gebhardt · Monsheim, DE

Key dates

Filing date	Oct 27, 2017
Grant date	Mar 30, 2021
Priority date	—
Expiry date	Oct 27, 2037

Classification

Technology area (CPC A)Human Necessities
CPC primaryA01N43/58
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for the purification of pyrazolpyridazines of formula I wherein the variables are as defined in the specification, by adding HCl to a solution of the pyrazolpyridazine in an inert solvent under non-aqueous conditions, effecting crystallization of the HCl-salt, isolating the resulting precipitate.

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