N-aryl1,2,4!triazolo1,5-a!pyridine-2-sulfonamide herbicides

US5700940A · kind A · utility

Assignee

• Dowelanco · US

Inventors

• John C. Van Heertum · Indianapolis, US
• William A. Kleschick · Martinez, US
• Kim E. Arndt · Carmel, US
• Mark J. Costales · Concord, US
• Robert J. Ehr · Indianapolis, US
• Kimberly Brubaker Bradley · Indianapolis, US
• Walter Reifschneider · Walnut Creek, US
• Zoltan L. Benko · Indianapolis, US
• Mary L. Ash · Midland, US
• John J. Jachetta · Pittsboro, US

Key dates

• Filing date: Sep 6, 1996
• Grant date: Dec 23, 1997
• Expiry date: Sep 6, 2016

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N43/90
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Substituted N-aryl1,2,4!triazolo1,5-a!pyridine-2-sulfonamide compounds, such as N-(2,6-difluorophenyl)-5-methoxy-7-methyl1,2,4!triazolo1,5-a!pyridine-2- sulfonamide, N-(4-bromo-1-methyl-3-pyrazolyl)-8-chloro-5-methoxy1,2,4!triazolo1,5-a!p yridine-2-sulfonamide, and N-(2-fluoro-4-methyl-3-pyridinyl)-8-ethoxy-6-chloro1,2,4!triazolo1,5-a!p yridine-2-sulfonamide, were prepared by condensation of a 2-chlorosulfonyl1,2,4!triazolo1,5-a!pyridine compound with an aryl amine. The compounds prepared were found to possess excellent herbicidal activity on a broad spectrum of vegetation at low application rates.