Patent · US Expired

Preparation of p-nitrophenyl-imidazoles

US5008398A · kind A · utility

3Cited by

0References

6Claims

0Family size

Assignee

BASF SE

Inventors

Hermann Koehler · Beindersheim, DE
Klaus Ebel · Lampertheim, DE
Helmut Karn · Ludwigshafen, DE
Christof Taubitz · Monsheim, DE

Key dates

Filing date	Oct 2, 1989
Grant date	Apr 16, 1991
Priority date	—
Expiry date	Oct 2, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D233/64
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of imidazoles which are substituted with p-nitrophenyl in the 2- and/or 4- and/or 5-position and may carry additional substituents, by reacting imidazoles which are substituted by phenyl in the 2- and/or 4- and/or 5-position and may carry additional substituents with mixtures of sulfuric acid and nitric acid, wherein the reaction is carried out in the presence of urea.

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