1-alkyl-4-benzoyl-5-hydroxypyrazole compounds and their use as herbicides

US6010981A · kind A · utility

Assignee

• DOW AGROSCIENCES LLC · US

Inventors

• Thomas L. Siddall · Zionsville, US
• Zoltan L. Benko · Indianapolis, US
• Gail M. Garvin · Indianapolis, US
• Johnny L. Jackson · Indianapolis, US
• Jeffrey M. McQuiston · Indianapolis, US
• David G. Ouse · Indianapolis, US
• Thomas D. Thibault · Indianapolis, US
• James A. Turner · Belton, US
• John C. Van Heertum · Indianapolis, US

Key dates

• Filing date: May 18, 1998
• Grant date: Jan 4, 2000
• Expiry date: May 18, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D231/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

1-Alkyl-4-benzoyl-5-hydroxypyrazole compounds in which the benzoyl moiety is substituted in the 2-position with a halo, alkyl, or alkoxy group, in the 4-position with an alkylsulfonyl group, and in the 3-position with an optionally substituted phenyl group, for example, 1-(1,1-dimethylethyl)-4-(2-methyl-4-methylsulfonyl-3-(4-methoxyphenyl)benz oyl-5-hydroxypyrazole, were prepared and found to be useful for the control of a variety of broadleaf and grassy weeds. The compounds can be applied either preemergently or postemergently and can be used to control undesirable vegetation selectively in small grain crops and turf or non-selectively.