Pyridylsulfonylureas as herbicides and plant growth regulators, processes for their preparation and their use

US5635451A · kind A · utility

Assignee

• Hoechst Schering Agrevo GmbH · DE

Inventors

• Heinz Kehne · Hofheim, DE
• Lothar Willms · Hillscheid, DE
• Oswald Ort · Königstein, DE
• Klaus Bauer · Rodgau, DE
• Hermann Bieringer · Eppstein, DE

Key dates

• Filing date: Jun 8, 1992
• Grant date: Jun 3, 1997
• Expiry date: Jun 8, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D521/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of formula (I), where R.sup.1, R.sup.2, n, W, R.sup.3 and A are as defined in claim 1, are suitable for use as herbicides and plant growth regulators. They can be produced by a process similar to known processes. To produce them, new compounds of formula (II) are reacted with a carbamate of formula R*--O--CO--NR.sup.3 A, where R.sup.3 stands for phenyl or alkyl. The compounds of formula (II) can be obtained from the corresponding sulphochlorides.