Preparation of trichloromethyl-trifluoro methyl-benzenes

US4079090A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Buttner
• Erich Klauke
• Herbert Schwarz · Niedereschach, DE
• Fritz Doring · Odenthal, DE

Key dates

• Filing date: Oct 12, 1976
• Grant date: Mar 14, 1978
• Expiry date: Oct 12, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/202
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing a xylene which is fluorinated and chlorinated in the side chain, having the formula ##STR1## wherein X represents hydrogen or fluorine and PA1 Y represents hydrogen or chlorine and PA1 R.sup.1 and R.sup.2 are identical or different and represent hydrogen, halogen, a trifluoromethyl or trichloromethyl group or an aliphatic or aromatic radical and PA1 R.sup.1 and R.sup.2 can be bonded via hydrocarbon members to form an aromatic ring, By contacting a compound of the formula ##STR2## wherein X, R.sup.1 and R.sup.2 have the above-mentioned meanings, WITH A COMPOUND OF THE FORMULA ##STR3## wherein X, R.sup.1 and R.sup.2 have the above-mentioned meanings, in the presence of a halogen transfer catalyst at elevated temperature.