Process for preparing aromatic bromine compounds

US4855517A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans Joachim Metz · Darmstadt, DE
• Klaus Warning · Eppstein, DE

Key dates

• Filing date: Sep 21, 1987
• Grant date: Aug 8, 1989
• Expiry date: Sep 21, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aromatic bromine compounds are prepared by reacting aromatic nitro compounds with elemental bromine in the gas phase at temperatures between about 310.degree. to 550.degree. C. In this reaction, the nitro groups are selectively replaced by bromine; further bromination of the aromatic system beyond that does not take place.