Preparation of 2-imidazolines

US4298748A · 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
• Hans J. Szymanski

Key dates

• Filing date: Nov 27, 1979
• Grant date: Nov 3, 1981
• Expiry date: Nov 27, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D233/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A novel process for the preparation of 2-imidazolines by reacting 1,2-diamines with nitriles or carbonyl compounds in the gas phase at from 200.degree. to 450.degree. C. in the presence of an oxide or phosphate of a metal of group 3 or 4 of the periodic table and/or in the presence of silicon dioxide. The 2-imidazolines obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.