Preparation of imidazoles

US4340744A · kind A · utility

Assignee

• BASF SE

Inventors

• Helmut Schwarz · Ludwigshafen, DE
• Toni Dockner
• Uwe Kempe · Schifferstadt, DE
• Herbert Krug · Ludwigshafen, DE
• Werner Praetorius · Ludwigshafen, DE
• Peter Magnussen · Bad Dürkheim, DE
• Ewald Gallei · Viernheim, DE
• Erich K. Fehr · Vellmar, DE

Key dates

• Filing date: Mar 9, 1981
• Grant date: Jul 20, 1982
• Expiry date: Mar 9, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D233/54
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Imidazoles are prepared by reacting 2-imidazolines at from 250.degree. to 500.degree. C. in the presence of molybdenum oxide and nickel oxide and/or cobalt oxide and aluminum oxide, silicon dioxide and/or silicates as catalysts. The imidazoles obtainable by the process according to the invention are valuable starting materials for the preparation of dyes, crop protection agents, textile auxiliaries, catalysts for polyurethanes and epoxy resins, surfactants and drugs, for example the corresponding nitroimidazoles.