Herbicidal sulfonylureas, their preparation and use

US6413911B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Horst Mayer · Ludwigshafen, DE
• Gerhard Hamprecht · Weinheim, DE
• Karl-Otto Westphalen · Speyer, DE
• Matthias Gerber · Schifferstadt, DE
• Helmut Walter · Obrigheim, DE

Key dates

• Filing date: Jun 14, 2001
• Grant date: Jul 2, 2002
• Expiry date: Jun 14, 2021

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N47/36
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Sulfonylureas of the general formula I whereR1 is a methyl or ethyl group;R2 is C1-C3-alkoxycarbonyl, a C1-C2-alkyl group which carries 1 to 5 fluorine atoms, methylsulfonyl, dimethylaminosulfonyl, thiomethyl, methylsulfinyl, methylsulfonyloxy, trifluoromethoxy, difluoromethoxy, difluorochloromethoxy, difluorochloromethyl or nitro;R3 is hydrogen, methyl, methoxy, ethoxy, fluorine, chlorine or thiomethyl;W is hydrogen or chlorine andZ is CH or Nand their agriculturally utilizable salts are described.