Process for the production of urethanes

US4490551A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Feb 27, 1980
• Grant date: Dec 25, 1984
• Expiry date: Feb 27, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C269/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for producing urethanes by reacting aromatic amino compounds with aliphatic, cycloaliphatic or araliphatic alcohols and carbon monoxide under conditions of elevated temperature and pressure characterized in that the reaction takes place in the presence of PA1 (a) selenium, selenium compounds, sulfur and/or sulfur compounds, PA1 (b) aromatic nitro compounds, PA1 (c) tertiary organic amines and/or alkali metal salts of weak acids, PA1 (d) oxidizing agents of a specified group and, optionally PA1 (e) ammonia and/or aliphatic, araliphatic, cycloaliphatic or heterocyclic amines containing at least one hydrogen atom bound to an amine nitrogen.