Process for the preparation of carbonic acid diesters containing at least one aromatic ester group

US5149856A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Norbert Schon · Krefeld, DE
• Hans-Josef Buysch · Krefeld, DE
• Wolfgang Ebert · Krefeld, DE

Key dates

• Filing date: Feb 20, 1991
• Grant date: Sep 22, 1992
• Expiry date: Feb 20, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aromatic and aliphatic-aromatic carbonic acid diesters can be obtained by transesterification of carbonic acid diesters containing aliphatic ester groups if polymeric hydroxystannoxanes are employed as catalysts.