Process for preparing 2,2'-dimethyl-1,1'binaphthyl and 2,7'-dimethyl-1,1'-binaphthyl

US5767333A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans Millauer · Eschborn, DE
• Adolf Schmidt · Adelsheim, DE

Key dates

• Filing date: Dec 8, 1994
• Grant date: Jun 16, 1998
• Expiry date: Dec 8, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C15/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2,7'-Dimethyl-1,1'-binaphthyl and a process for preparing 2,2'-dimethyl-1,1'-binaphthyl and 2,7'-dimethyl-1,1'-binaphthyl by electrochemically oxidatively dimerizing 2-methylnaphthalene in the presence of acetonitrile/water/electrolyte salt mixtures which additionally contain at least one further component which, is immiscible or only partially miscible with water, and rectifying the reaction mixture obtained under reduced pressure.