Process for the preparation of halogen-containing aromatic compounds

US4968845A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Joachim Hackenbruch · Ginsheim-Gustavsburg, DE
• Theodor Papenfuhs · Frankfurt, DE
• Klaus Warning · Eppstein, DE
• Gunter Siegemund · Hofheim, DE

Key dates

• Filing date: Mar 7, 1989
• Grant date: Nov 6, 1990
• Expiry date: Mar 7, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C49/84
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of halogen-containing aromatic compounds of the formula ##STR1## wherein Hal represents fluorine, chlorine or bromine and Z represents an aromatic group which comprises reacting a halobenzene of the formula C.sub.6 H.sub.5 Hal (II) under anhydrous conditions with a halide of a bisacid having the formula Hal-CO-Z-CO-Hal (III) in a molar ratio of at least 2:1 in the presence of a haloalkane sulfonic acid of the formula Y(C.sub.n X.sub.2n)SO.sub.3 H (IV), in formulae II and III Hal and Z having the afore-mentioned meaning and Y representing fluorine or hydrogen, X at least one of fluorine and chlorine, but at least one X being fluorine, and n being an integer of from 1 to 10. The said bis-(4-halobenzoyl) compounds being useful monomers for chemically resistant plastics which are still resistant even at high temperatures.