Process for the preparation of urethane

US4304922A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Robert Becker · Warsaw, US
• Johann Grolig · Leverkusen, DE
• Christian Rasp · Cologne, DE
• Gunter Stammann · Cologne, DE

Key dates

• Filing date: Feb 27, 1980
• Grant date: Dec 8, 1981
• Expiry date: Feb 27, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C271/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Production of urethanes by the oxycarbonylation reaction of N,N'-disubstituted ureas and organic compounds containing at least one hydroxyl group with carbon monoxide in the presence of molecular oxygen and/or organic nitro compounds and a catalyst system comprising (a) a noble metal and/or noble metal compound of the eighth subgroup of the periodic system of elements and (b) a compound of an element and/or elements of the third to fifth main group and/or first to eighth subgroup of the periodic system of elements characterized in that said compounds are capable of undergoing Redox reactions under the reaction conditions.