Preparation of aromatic urethanes

US4267353A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Joachim Scholl · Cologne, DE
• Armin Zenner · Dormagen, DE

Key dates

• Filing date: Aug 22, 1979
• Grant date: May 12, 1981
• Expiry date: Aug 22, 1999

Classification

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

Abstract

This invention relates to an improved process for the preparation of urethanes by the reaction of aromatic nitro compounds with alcohols and carbon monoxides in the presence of catalyst systems containing sulphur and/or selenium and/or compounds of these elements.