Process for the preparation of benzoyl ureas

US4918227A · kind A · utility

Assignee

• Shell Internationale Research Naatschappy B.V. · NL

Inventors

• Heinz-Manfred Becher · Bingen, DE
• Rudolf Mengel · Ingelheim am Rhein, DE
• Walter Ost · Bingen, DE

Key dates

• Filing date: Feb 9, 1987
• Grant date: Apr 17, 1990
• Expiry date: Feb 9, 2007

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N37/34
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Benzoyl ureas of the formula ##STR1## are prepared by starting from benzoyl derivatives of the formula EQU Q-COHal which are converted via the corresponding azides into the isocyanates, which are in turn reacted with corresponding benzamides.