Preparation of 2-imidazolines

US4340745A · kind A · utility

Assignee

• BASF SE

Inventors

• Toni Dockner
• Uwe Kempe · Schifferstadt, DE
• Herbert Krug · Ludwigshafen, DE
• Peter Magnussen · Bad Dürkheim, DE
• Werner Praetorius · Ludwigshafen, 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: C07D233/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2-Imidazolines are prepared by reacting N,N'-diformyl-1,2-diamines in the gas phase at 200.degree.-350.degree. C., in the presence of certain amounts of an inert gas, over zinc oxide of a particular structure or over a mixture of this zinc oxide and aluminum oxide, as the catalyst. The 2-imidazolines obtainable by the process according to the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.