Process for the preparation of 2-hydroxy-4-(2'-hydroxyethoxy) benzophenones

US4885396A · kind A · utility

Assignee

• BASF SE

Inventors

• Erwin Hahn · Heidelberg, DE
• Peter Neumann · Wiesloch, DE

Key dates

• Filing date: May 20, 1988
• Grant date: Dec 5, 1989
• Expiry date: May 20, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/71
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of 2-hydroxy-4-(2'-hydroxyethoxy)benzophenones, by reacting 2,4-dihydroxybenzophenones with ethylene carbonate in the presence of a quaternary ammonium salt catalyst at elevated temperatures, and isolating the finished product from the crude reaction mixture.