Herbicidal compositions based on N-(4-fluoro-phenyl)-N-isopropyl-chloroacetamide, and process for the preparation of this compound

US5831126A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Reinhard Lantzsch · Leverkusen, DE
• Heinz Forster · Wuppertal, DE
• Thomas Schmidt · Neustadt, DE
• Karl Steinbeck · Leawood, US
• Markus Dollinger · Leverkusen, DE
• Hans-Joachim Santel · Leverkusen, DE

Key dates

• Filing date: Jan 30, 1997
• Grant date: Nov 3, 1998
• Expiry date: Jan 30, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C233/15
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the use of the compound N-(4-fluoro-phenyl)-N-isopropyl-chloroacetamide of the formula (I) ##STR1## which is known, as active compound in selective herbicidal compositions, for example for combating weeds in maize cultures, and to a new process for the preparation of this active compound. The compound (I) is obtained in very high yields by reacting N-isopropyl-4-fluoro-aniline with approximately equimolar amounts of chloroacetyl chloride at temperatures between 20.degree. and 150.degree. C. in the presence of an inert diluent, such as, for example, toluene, without addition of an acid binder.