Patent · US Expired

Preparation of imidazole-4,5-dicarboxylic acid

US4550176A · kind A · utility

2Cited by

0References

15Claims

0Family size

Assignee

BASF SE

Inventors

Toni Dockner
Uwe Kempe · Schifferstadt, DE
Anton Frank · Ludwigshafen, DE

Key dates

Filing date	Jan 11, 1984
Grant date	Oct 29, 1985
Priority date	—
Expiry date	Jan 11, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D233/90
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Imidazole-4,5-dicarboxylic acid is prepared by a process in which imidazole is reacted with formaldehyde, and the reaction mixture is treated with nitric acid.

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