Process for the production of cyclic carbonic acid esters

US5023346A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Nov 13, 1989
• Grant date: Jun 11, 1991
• Expiry date: Nov 13, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D319/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Cyclic carbonic acid esters are produced by reaction of hydroxy compounds with phosgene in the presence of a heterocyclic compound containing at least one nitrogen atom as ring member in an aromatic ring.