Preparation of diarylethanes

US5939595A · kind A · utility

Assignee

• BASF SE

Inventors

• Eugen Gehrer · Stockach, DE
• Klemens Massonne · Bad Dürkheim, DE
• Hermann Gausepohl · Mutterstadt, DE
• Martin Fischer · Ludwigshafen, DE
• Christopher William Rieker · Ludwigshafen, DE
• Lorenz Siggel · Heidelberg, DE

Key dates

• Filing date: Apr 26, 1996
• Grant date: Aug 17, 1999
• Expiry date: Apr 26, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2529/70
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing diarylethanes of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each hydrogen or C.sub.1 -C.sub.8 -alkyl, by reacting aromatic compounds of the general formula II ##STR2## where R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 have the abovementioned meanings, with styrenes of the general formula III ##STR3## where R.sup.1 has the abovementioned meanings, at from -20 to 300.degree. C. under from 1 to 100 bar in the presence of heterogeneous catalysts, wherein beta-zeolites or mordenites are used as heterogeneous catalysts.