N-aryl[1,2,4]triazolo[1,5-a]pyridine-2-sulfonamide herbicides

US5571775A · 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
• Zolt an Benk o · Indianapolis, US
• John J. Jachetta · Pittsboro, US

Key dates

• Filing date: Jun 6, 1995
• Grant date: Nov 5, 1996
• Expiry date: Jun 6, 2015

Classification

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

Abstract

Substituted N-aryl[1,2,4]triazolo[1,5-a]pyridine-2-sulfonamide compounds, such as N-(2,6-difluorophenyl)-5-methoxy-7-methyl[1,2,4]triazolo[1,5-a]pyridine-2- sulfonamide, N-(4-bromo-1-methyl-3-pyrazoly)-8-chloro-5-methoxy[1,2,4]triazolo[1,5-a]py ridine-2-sulfonamide, and N-(2-fluoro-4-methyl-3-pyridinyl)-8-ethoxy-6-chloro[1,2,4]triazolo[1,5-a]- pyridine-2-sulfonamide, were prepared by condensation of a 2-chlorosulfonyl[1,2,4]triazolo[1,5-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.